drivers/crypto/hifn_795x.c

   1 /*
   2  * 2007+ Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru>
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/module.h>
  22 #include <linux/moduleparam.h>
  23 #include <linux/mod_devicetable.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/pci.h>
  26 #include <linux/slab.h>
  27 #include <linux/delay.h>
  28 #include <linux/mm.h>
  29 #include <linux/dma-mapping.h>
  30 #include <linux/scatterlist.h>
  31 #include <linux/highmem.h>
  32 #include <linux/crypto.h>
  33 #include <linux/hw_random.h>
  34 #include <linux/ktime.h>
  35
  36 #include <crypto/algapi.h>
  37 #include <crypto/des.h>
  38
  39 #include <asm/kmap_types.h>
  40
  41 //#define HIFN_DEBUG
  42
  43 #ifdef HIFN_DEBUG
  44 #define dprintk(f, a...)        printk(f, ##a)
  45 #else
  46 #define dprintk(f, a...)        do {} while (0)
  47 #endif
  48
  49 static char hifn_pll_ref[sizeof("extNNN")] = "ext";
  50 module_param_string(hifn_pll_ref, hifn_pll_ref, sizeof(hifn_pll_ref), 0444);
  51 MODULE_PARM_DESC(hifn_pll_ref,
  52                  "PLL reference clock (pci[freq] or ext[freq], default ext)");
  53
  54 static atomic_t hifn_dev_number;
  55
  56 #define ACRYPTO_OP_DECRYPT      0
  57 #define ACRYPTO_OP_ENCRYPT      1
  58 #define ACRYPTO_OP_HMAC         2
  59 #define ACRYPTO_OP_RNG          3
  60
  61 #define ACRYPTO_MODE_ECB                0
  62 #define ACRYPTO_MODE_CBC                1
  63 #define ACRYPTO_MODE_CFB                2
  64 #define ACRYPTO_MODE_OFB                3
  65
  66 #define ACRYPTO_TYPE_AES_128    0
  67 #define ACRYPTO_TYPE_AES_192    1
  68 #define ACRYPTO_TYPE_AES_256    2
  69 #define ACRYPTO_TYPE_3DES       3
  70 #define ACRYPTO_TYPE_DES        4
  71
  72 #define PCI_VENDOR_ID_HIFN              0x13A3
  73 #define PCI_DEVICE_ID_HIFN_7955         0x0020
  74 #define PCI_DEVICE_ID_HIFN_7956         0x001d
  75
  76 /* I/O region sizes */
  77
  78 #define HIFN_BAR0_SIZE                  0x1000
  79 #define HIFN_BAR1_SIZE                  0x2000
  80 #define HIFN_BAR2_SIZE                  0x8000
  81
  82 /* DMA registres */
  83
  84 #define HIFN_DMA_CRA                    0x0C    /* DMA Command Ring Address */
  85 #define HIFN_DMA_SDRA                   0x1C    /* DMA Source Data Ring Address */
  86 #define HIFN_DMA_RRA                    0x2C    /* DMA Result Ring Address */
  87 #define HIFN_DMA_DDRA                   0x3C    /* DMA Destination Data Ring Address */
  88 #define HIFN_DMA_STCTL                  0x40    /* DMA Status and Control */
  89 #define HIFN_DMA_INTREN                 0x44    /* DMA Interrupt Enable */
  90 #define HIFN_DMA_CFG1                   0x48    /* DMA Configuration #1 */
  91 #define HIFN_DMA_CFG2                   0x6C    /* DMA Configuration #2 */
  92 #define HIFN_CHIP_ID                    0x98    /* Chip ID */
  93
  94 /*
  95  * Processing Unit Registers (offset from BASEREG0)
  96  */
  97 #define HIFN_0_PUDATA           0x00    /* Processing Unit Data */
  98 #define HIFN_0_PUCTRL           0x04    /* Processing Unit Control */
  99 #define HIFN_0_PUISR            0x08    /* Processing Unit Interrupt Status */
 100 #define HIFN_0_PUCNFG           0x0c    /* Processing Unit Configuration */
 101 #define HIFN_0_PUIER            0x10    /* Processing Unit Interrupt Enable */
 102 #define HIFN_0_PUSTAT           0x14    /* Processing Unit Status/Chip ID */
 103 #define HIFN_0_FIFOSTAT         0x18    /* FIFO Status */
 104 #define HIFN_0_FIFOCNFG         0x1c    /* FIFO Configuration */
 105 #define HIFN_0_SPACESIZE        0x20    /* Register space size */
 106
 107 /* Processing Unit Control Register (HIFN_0_PUCTRL) */
 108 #define HIFN_PUCTRL_CLRSRCFIFO  0x0010  /* clear source fifo */
 109 #define HIFN_PUCTRL_STOP        0x0008  /* stop pu */
 110 #define HIFN_PUCTRL_LOCKRAM     0x0004  /* lock ram */
 111 #define HIFN_PUCTRL_DMAENA      0x0002  /* enable dma */
 112 #define HIFN_PUCTRL_RESET       0x0001  /* Reset processing unit */
 113
 114 /* Processing Unit Interrupt Status Register (HIFN_0_PUISR) */
 115 #define HIFN_PUISR_CMDINVAL     0x8000  /* Invalid command interrupt */
 116 #define HIFN_PUISR_DATAERR      0x4000  /* Data error interrupt */
 117 #define HIFN_PUISR_SRCFIFO      0x2000  /* Source FIFO ready interrupt */
 118 #define HIFN_PUISR_DSTFIFO      0x1000  /* Destination FIFO ready interrupt */
 119 #define HIFN_PUISR_DSTOVER      0x0200  /* Destination overrun interrupt */
 120 #define HIFN_PUISR_SRCCMD       0x0080  /* Source command interrupt */
 121 #define HIFN_PUISR_SRCCTX       0x0040  /* Source context interrupt */
 122 #define HIFN_PUISR_SRCDATA      0x0020  /* Source data interrupt */
 123 #define HIFN_PUISR_DSTDATA      0x0010  /* Destination data interrupt */
 124 #define HIFN_PUISR_DSTRESULT    0x0004  /* Destination result interrupt */
 125
 126 /* Processing Unit Configuration Register (HIFN_0_PUCNFG) */
 127 #define HIFN_PUCNFG_DRAMMASK    0xe000  /* DRAM size mask */
 128 #define HIFN_PUCNFG_DSZ_256K    0x0000  /* 256k dram */
 129 #define HIFN_PUCNFG_DSZ_512K    0x2000  /* 512k dram */
 130 #define HIFN_PUCNFG_DSZ_1M      0x4000  /* 1m dram */
 131 #define HIFN_PUCNFG_DSZ_2M      0x6000  /* 2m dram */
 132 #define HIFN_PUCNFG_DSZ_4M      0x8000  /* 4m dram */
 133 #define HIFN_PUCNFG_DSZ_8M      0xa000  /* 8m dram */
 134 #define HIFN_PUNCFG_DSZ_16M     0xc000  /* 16m dram */
 135 #define HIFN_PUCNFG_DSZ_32M     0xe000  /* 32m dram */
 136 #define HIFN_PUCNFG_DRAMREFRESH 0x1800  /* DRAM refresh rate mask */
 137 #define HIFN_PUCNFG_DRFR_512    0x0000  /* 512 divisor of ECLK */
 138 #define HIFN_PUCNFG_DRFR_256    0x0800  /* 256 divisor of ECLK */
 139 #define HIFN_PUCNFG_DRFR_128    0x1000  /* 128 divisor of ECLK */
 140 #define HIFN_PUCNFG_TCALLPHASES 0x0200  /* your guess is as good as mine... */
 141 #define HIFN_PUCNFG_TCDRVTOTEM  0x0100  /* your guess is as good as mine... */
 142 #define HIFN_PUCNFG_BIGENDIAN   0x0080  /* DMA big endian mode */
 143 #define HIFN_PUCNFG_BUS32       0x0040  /* Bus width 32bits */
 144 #define HIFN_PUCNFG_BUS16       0x0000  /* Bus width 16 bits */
 145 #define HIFN_PUCNFG_CHIPID      0x0020  /* Allow chipid from PUSTAT */
 146 #define HIFN_PUCNFG_DRAM        0x0010  /* Context RAM is DRAM */
 147 #define HIFN_PUCNFG_SRAM        0x0000  /* Context RAM is SRAM */
 148 #define HIFN_PUCNFG_COMPSING    0x0004  /* Enable single compression context */
 149 #define HIFN_PUCNFG_ENCCNFG     0x0002  /* Encryption configuration */
 150
 151 /* Processing Unit Interrupt Enable Register (HIFN_0_PUIER) */
 152 #define HIFN_PUIER_CMDINVAL     0x8000  /* Invalid command interrupt */
 153 #define HIFN_PUIER_DATAERR      0x4000  /* Data error interrupt */
 154 #define HIFN_PUIER_SRCFIFO      0x2000  /* Source FIFO ready interrupt */
 155 #define HIFN_PUIER_DSTFIFO      0x1000  /* Destination FIFO ready interrupt */
 156 #define HIFN_PUIER_DSTOVER      0x0200  /* Destination overrun interrupt */
 157 #define HIFN_PUIER_SRCCMD       0x0080  /* Source command interrupt */
 158 #define HIFN_PUIER_SRCCTX       0x0040  /* Source context interrupt */
 159 #define HIFN_PUIER_SRCDATA      0x0020  /* Source data interrupt */
 160 #define HIFN_PUIER_DSTDATA      0x0010  /* Destination data interrupt */
 161 #define HIFN_PUIER_DSTRESULT    0x0004  /* Destination result interrupt */
 162
 163 /* Processing Unit Status Register/Chip ID (HIFN_0_PUSTAT) */
 164 #define HIFN_PUSTAT_CMDINVAL    0x8000  /* Invalid command interrupt */
 165 #define HIFN_PUSTAT_DATAERR     0x4000  /* Data error interrupt */
 166 #define HIFN_PUSTAT_SRCFIFO     0x2000  /* Source FIFO ready interrupt */
 167 #define HIFN_PUSTAT_DSTFIFO     0x1000  /* Destination FIFO ready interrupt */
 168 #define HIFN_PUSTAT_DSTOVER     0x0200  /* Destination overrun interrupt */
 169 #define HIFN_PUSTAT_SRCCMD      0x0080  /* Source command interrupt */
 170 #define HIFN_PUSTAT_SRCCTX      0x0040  /* Source context interrupt */
 171 #define HIFN_PUSTAT_SRCDATA     0x0020  /* Source data interrupt */
 172 #define HIFN_PUSTAT_DSTDATA     0x0010  /* Destination data interrupt */
 173 #define HIFN_PUSTAT_DSTRESULT   0x0004  /* Destination result interrupt */
 174 #define HIFN_PUSTAT_CHIPREV     0x00ff  /* Chip revision mask */
 175 #define HIFN_PUSTAT_CHIPENA     0xff00  /* Chip enabled mask */
 176 #define HIFN_PUSTAT_ENA_2       0x1100  /* Level 2 enabled */
 177 #define HIFN_PUSTAT_ENA_1       0x1000  /* Level 1 enabled */
 178 #define HIFN_PUSTAT_ENA_0       0x3000  /* Level 0 enabled */
 179 #define HIFN_PUSTAT_REV_2       0x0020  /* 7751 PT6/2 */
 180 #define HIFN_PUSTAT_REV_3       0x0030  /* 7751 PT6/3 */
 181
 182 /* FIFO Status Register (HIFN_0_FIFOSTAT) */
 183 #define HIFN_FIFOSTAT_SRC       0x7f00  /* Source FIFO available */
 184 #define HIFN_FIFOSTAT_DST       0x007f  /* Destination FIFO available */
 185
 186 /* FIFO Configuration Register (HIFN_0_FIFOCNFG) */
 187 #define HIFN_FIFOCNFG_THRESHOLD 0x0400  /* must be written as 1 */
 188
 189 /*
 190  * DMA Interface Registers (offset from BASEREG1)
 191  */
 192 #define HIFN_1_DMA_CRAR         0x0c    /* DMA Command Ring Address */
 193 #define HIFN_1_DMA_SRAR         0x1c    /* DMA Source Ring Address */
 194 #define HIFN_1_DMA_RRAR         0x2c    /* DMA Result Ring Address */
 195 #define HIFN_1_DMA_DRAR         0x3c    /* DMA Destination Ring Address */
 196 #define HIFN_1_DMA_CSR          0x40    /* DMA Status and Control */
 197 #define HIFN_1_DMA_IER          0x44    /* DMA Interrupt Enable */
 198 #define HIFN_1_DMA_CNFG         0x48    /* DMA Configuration */
 199 #define HIFN_1_PLL              0x4c    /* 795x: PLL config */
 200 #define HIFN_1_7811_RNGENA      0x60    /* 7811: rng enable */
 201 #define HIFN_1_7811_RNGCFG      0x64    /* 7811: rng config */
 202 #define HIFN_1_7811_RNGDAT      0x68    /* 7811: rng data */
 203 #define HIFN_1_7811_RNGSTS      0x6c    /* 7811: rng status */
 204 #define HIFN_1_7811_MIPSRST     0x94    /* 7811: MIPS reset */
 205 #define HIFN_1_REVID            0x98    /* Revision ID */
 206 #define HIFN_1_UNLOCK_SECRET1   0xf4
 207 #define HIFN_1_UNLOCK_SECRET2   0xfc
 208 #define HIFN_1_PUB_RESET        0x204   /* Public/RNG Reset */
 209 #define HIFN_1_PUB_BASE         0x300   /* Public Base Address */
 210 #define HIFN_1_PUB_OPLEN        0x304   /* Public Operand Length */
 211 #define HIFN_1_PUB_OP           0x308   /* Public Operand */
 212 #define HIFN_1_PUB_STATUS       0x30c   /* Public Status */
 213 #define HIFN_1_PUB_IEN          0x310   /* Public Interrupt enable */
 214 #define HIFN_1_RNG_CONFIG       0x314   /* RNG config */
 215 #define HIFN_1_RNG_DATA         0x318   /* RNG data */
 216 #define HIFN_1_PUB_MEM          0x400   /* start of Public key memory */
 217 #define HIFN_1_PUB_MEMEND       0xbff   /* end of Public key memory */
 218
 219 /* DMA Status and Control Register (HIFN_1_DMA_CSR) */
 220 #define HIFN_DMACSR_D_CTRLMASK  0xc0000000      /* Destinition Ring Control */
 221 #define HIFN_DMACSR_D_CTRL_NOP  0x00000000      /* Dest. Control: no-op */
 222 #define HIFN_DMACSR_D_CTRL_DIS  0x40000000      /* Dest. Control: disable */
 223 #define HIFN_DMACSR_D_CTRL_ENA  0x80000000      /* Dest. Control: enable */
 224 #define HIFN_DMACSR_D_ABORT     0x20000000      /* Destinition Ring PCIAbort */
 225 #define HIFN_DMACSR_D_DONE      0x10000000      /* Destinition Ring Done */
 226 #define HIFN_DMACSR_D_LAST      0x08000000      /* Destinition Ring Last */
 227 #define HIFN_DMACSR_D_WAIT      0x04000000      /* Destinition Ring Waiting */
 228 #define HIFN_DMACSR_D_OVER      0x02000000      /* Destinition Ring Overflow */
 229 #define HIFN_DMACSR_R_CTRL      0x00c00000      /* Result Ring Control */
 230 #define HIFN_DMACSR_R_CTRL_NOP  0x00000000      /* Result Control: no-op */
 231 #define HIFN_DMACSR_R_CTRL_DIS  0x00400000      /* Result Control: disable */
 232 #define HIFN_DMACSR_R_CTRL_ENA  0x00800000      /* Result Control: enable */
 233 #define HIFN_DMACSR_R_ABORT     0x00200000      /* Result Ring PCI Abort */
 234 #define HIFN_DMACSR_R_DONE      0x00100000      /* Result Ring Done */
 235 #define HIFN_DMACSR_R_LAST      0x00080000      /* Result Ring Last */
 236 #define HIFN_DMACSR_R_WAIT      0x00040000      /* Result Ring Waiting */
 237 #define HIFN_DMACSR_R_OVER      0x00020000      /* Result Ring Overflow */
 238 #define HIFN_DMACSR_S_CTRL      0x0000c000      /* Source Ring Control */
 239 #define HIFN_DMACSR_S_CTRL_NOP  0x00000000      /* Source Control: no-op */
 240 #define HIFN_DMACSR_S_CTRL_DIS  0x00004000      /* Source Control: disable */
 241 #define HIFN_DMACSR_S_CTRL_ENA  0x00008000      /* Source Control: enable */
 242 #define HIFN_DMACSR_S_ABORT     0x00002000      /* Source Ring PCI Abort */
 243 #define HIFN_DMACSR_S_DONE      0x00001000      /* Source Ring Done */
 244 #define HIFN_DMACSR_S_LAST      0x00000800      /* Source Ring Last */
 245 #define HIFN_DMACSR_S_WAIT      0x00000400      /* Source Ring Waiting */
 246 #define HIFN_DMACSR_ILLW        0x00000200      /* Illegal write (7811 only) */
 247 #define HIFN_DMACSR_ILLR        0x00000100      /* Illegal read (7811 only) */
 248 #define HIFN_DMACSR_C_CTRL      0x000000c0      /* Command Ring Control */
 249 #define HIFN_DMACSR_C_CTRL_NOP  0x00000000      /* Command Control: no-op */
 250 #define HIFN_DMACSR_C_CTRL_DIS  0x00000040      /* Command Control: disable */
 251 #define HIFN_DMACSR_C_CTRL_ENA  0x00000080      /* Command Control: enable */
 252 #define HIFN_DMACSR_C_ABORT     0x00000020      /* Command Ring PCI Abort */
 253 #define HIFN_DMACSR_C_DONE      0x00000010      /* Command Ring Done */
 254 #define HIFN_DMACSR_C_LAST      0x00000008      /* Command Ring Last */
 255 #define HIFN_DMACSR_C_WAIT      0x00000004      /* Command Ring Waiting */
 256 #define HIFN_DMACSR_PUBDONE     0x00000002      /* Public op done (7951 only) */
 257 #define HIFN_DMACSR_ENGINE      0x00000001      /* Command Ring Engine IRQ */
 258
 259 /* DMA Interrupt Enable Register (HIFN_1_DMA_IER) */
 260 #define HIFN_DMAIER_D_ABORT     0x20000000      /* Destination Ring PCIAbort */
 261 #define HIFN_DMAIER_D_DONE      0x10000000      /* Destination Ring Done */
 262 #define HIFN_DMAIER_D_LAST      0x08000000      /* Destination Ring Last */
 263 #define HIFN_DMAIER_D_WAIT      0x04000000      /* Destination Ring Waiting */
 264 #define HIFN_DMAIER_D_OVER      0x02000000      /* Destination Ring Overflow */
 265 #define HIFN_DMAIER_R_ABORT     0x00200000      /* Result Ring PCI Abort */
 266 #define HIFN_DMAIER_R_DONE      0x00100000      /* Result Ring Done */
 267 #define HIFN_DMAIER_R_LAST      0x00080000      /* Result Ring Last */
 268 #define HIFN_DMAIER_R_WAIT      0x00040000      /* Result Ring Waiting */
 269 #define HIFN_DMAIER_R_OVER      0x00020000      /* Result Ring Overflow */
 270 #define HIFN_DMAIER_S_ABORT     0x00002000      /* Source Ring PCI Abort */
 271 #define HIFN_DMAIER_S_DONE      0x00001000      /* Source Ring Done */
 272 #define HIFN_DMAIER_S_LAST      0x00000800      /* Source Ring Last */
 273 #define HIFN_DMAIER_S_WAIT      0x00000400      /* Source Ring Waiting */
 274 #define HIFN_DMAIER_ILLW        0x00000200      /* Illegal write (7811 only) */
 275 #define HIFN_DMAIER_ILLR        0x00000100      /* Illegal read (7811 only) */
 276 #define HIFN_DMAIER_C_ABORT     0x00000020      /* Command Ring PCI Abort */
 277 #define HIFN_DMAIER_C_DONE      0x00000010      /* Command Ring Done */
 278 #define HIFN_DMAIER_C_LAST      0x00000008      /* Command Ring Last */
 279 #define HIFN_DMAIER_C_WAIT      0x00000004      /* Command Ring Waiting */
 280 #define HIFN_DMAIER_PUBDONE     0x00000002      /* public op done (7951 only) */
 281 #define HIFN_DMAIER_ENGINE      0x00000001      /* Engine IRQ */
 282
 283 /* DMA Configuration Register (HIFN_1_DMA_CNFG) */
 284 #define HIFN_DMACNFG_BIGENDIAN  0x10000000      /* big endian mode */
 285 #define HIFN_DMACNFG_POLLFREQ   0x00ff0000      /* Poll frequency mask */
 286 #define HIFN_DMACNFG_UNLOCK     0x00000800
 287 #define HIFN_DMACNFG_POLLINVAL  0x00000700      /* Invalid Poll Scalar */
 288 #define HIFN_DMACNFG_LAST       0x00000010      /* Host control LAST bit */
 289 #define HIFN_DMACNFG_MODE       0x00000004      /* DMA mode */
 290 #define HIFN_DMACNFG_DMARESET   0x00000002      /* DMA Reset # */
 291 #define HIFN_DMACNFG_MSTRESET   0x00000001      /* Master Reset # */
 292
 293 /* PLL configuration register */
 294 #define HIFN_PLL_REF_CLK_HBI    0x00000000      /* HBI reference clock */
 295 #define HIFN_PLL_REF_CLK_PLL    0x00000001      /* PLL reference clock */
 296 #define HIFN_PLL_BP             0x00000002      /* Reference clock bypass */
 297 #define HIFN_PLL_PK_CLK_HBI     0x00000000      /* PK engine HBI clock */
 298 #define HIFN_PLL_PK_CLK_PLL     0x00000008      /* PK engine PLL clock */
 299 #define HIFN_PLL_PE_CLK_HBI     0x00000000      /* PE engine HBI clock */
 300 #define HIFN_PLL_PE_CLK_PLL     0x00000010      /* PE engine PLL clock */
 301 #define HIFN_PLL_RESERVED_1     0x00000400      /* Reserved bit, must be 1 */
 302 #define HIFN_PLL_ND_SHIFT       11              /* Clock multiplier shift */
 303 #define HIFN_PLL_ND_MULT_2      0x00000000      /* PLL clock multiplier 2 */
 304 #define HIFN_PLL_ND_MULT_4      0x00000800      /* PLL clock multiplier 4 */
 305 #define HIFN_PLL_ND_MULT_6      0x00001000      /* PLL clock multiplier 6 */
 306 #define HIFN_PLL_ND_MULT_8      0x00001800      /* PLL clock multiplier 8 */
 307 #define HIFN_PLL_ND_MULT_10     0x00002000      /* PLL clock multiplier 10 */
 308 #define HIFN_PLL_ND_MULT_12     0x00002800      /* PLL clock multiplier 12 */
 309 #define HIFN_PLL_IS_1_8         0x00000000      /* charge pump (mult. 1-8) */
 310 #define HIFN_PLL_IS_9_12        0x00010000      /* charge pump (mult. 9-12) */
 311
 312 #define HIFN_PLL_FCK_MAX        266             /* Maximum PLL frequency */
 313
 314 /* Public key reset register (HIFN_1_PUB_RESET) */
 315 #define HIFN_PUBRST_RESET       0x00000001      /* reset public/rng unit */
 316
 317 /* Public base address register (HIFN_1_PUB_BASE) */
 318 #define HIFN_PUBBASE_ADDR       0x00003fff      /* base address */
 319
 320 /* Public operand length register (HIFN_1_PUB_OPLEN) */
 321 #define HIFN_PUBOPLEN_MOD_M     0x0000007f      /* modulus length mask */
 322 #define HIFN_PUBOPLEN_MOD_S     0               /* modulus length shift */
 323 #define HIFN_PUBOPLEN_EXP_M     0x0003ff80      /* exponent length mask */
 324 #define HIFN_PUBOPLEN_EXP_S     7               /* exponent length shift */
 325 #define HIFN_PUBOPLEN_RED_M     0x003c0000      /* reducend length mask */
 326 #define HIFN_PUBOPLEN_RED_S     18              /* reducend length shift */
 327
 328 /* Public operation register (HIFN_1_PUB_OP) */
 329 #define HIFN_PUBOP_AOFFSET_M    0x0000007f      /* A offset mask */
 330 #define HIFN_PUBOP_AOFFSET_S    0               /* A offset shift */
 331 #define HIFN_PUBOP_BOFFSET_M    0x00000f80      /* B offset mask */
 332 #define HIFN_PUBOP_BOFFSET_S    7               /* B offset shift */
 333 #define HIFN_PUBOP_MOFFSET_M    0x0003f000      /* M offset mask */
 334 #define HIFN_PUBOP_MOFFSET_S    12              /* M offset shift */
 335 #define HIFN_PUBOP_OP_MASK      0x003c0000      /* Opcode: */
 336 #define HIFN_PUBOP_OP_NOP       0x00000000      /*  NOP */
 337 #define HIFN_PUBOP_OP_ADD       0x00040000      /*  ADD */
 338 #define HIFN_PUBOP_OP_ADDC      0x00080000      /*  ADD w/carry */
 339 #define HIFN_PUBOP_OP_SUB       0x000c0000      /*  SUB */
 340 #define HIFN_PUBOP_OP_SUBC      0x00100000      /*  SUB w/carry */
 341 #define HIFN_PUBOP_OP_MODADD    0x00140000      /*  Modular ADD */
 342 #define HIFN_PUBOP_OP_MODSUB    0x00180000      /*  Modular SUB */
 343 #define HIFN_PUBOP_OP_INCA      0x001c0000      /*  INC A */
 344 #define HIFN_PUBOP_OP_DECA      0x00200000      /*  DEC A */
 345 #define HIFN_PUBOP_OP_MULT      0x00240000      /*  MULT */
 346 #define HIFN_PUBOP_OP_MODMULT   0x00280000      /*  Modular MULT */
 347 #define HIFN_PUBOP_OP_MODRED    0x002c0000      /*  Modular RED */
 348 #define HIFN_PUBOP_OP_MODEXP    0x00300000      /*  Modular EXP */
 349
 350 /* Public status register (HIFN_1_PUB_STATUS) */
 351 #define HIFN_PUBSTS_DONE        0x00000001      /* operation done */
 352 #define HIFN_PUBSTS_CARRY       0x00000002      /* carry */
 353
 354 /* Public interrupt enable register (HIFN_1_PUB_IEN) */
 355 #define HIFN_PUBIEN_DONE        0x00000001      /* operation done interrupt */
 356
 357 /* Random number generator config register (HIFN_1_RNG_CONFIG) */
 358 #define HIFN_RNGCFG_ENA         0x00000001      /* enable rng */
 359
 360 #define HIFN_NAMESIZE                   32
 361 #define HIFN_MAX_RESULT_ORDER           5
 362
 363 #define HIFN_D_CMD_RSIZE                24*1
 364 #define HIFN_D_SRC_RSIZE                80*1
 365 #define HIFN_D_DST_RSIZE                80*1
 366 #define HIFN_D_RES_RSIZE                24*1
 367
 368 #define HIFN_D_DST_DALIGN               4
 369
 370 #define HIFN_QUEUE_LENGTH               (HIFN_D_CMD_RSIZE - 1)
 371
 372 #define AES_MIN_KEY_SIZE                16
 373 #define AES_MAX_KEY_SIZE                32
 374
 375 #define HIFN_DES_KEY_LENGTH             8
 376 #define HIFN_3DES_KEY_LENGTH            24
 377 #define HIFN_MAX_CRYPT_KEY_LENGTH       AES_MAX_KEY_SIZE
 378 #define HIFN_IV_LENGTH                  8
 379 #define HIFN_AES_IV_LENGTH              16
 380 #define HIFN_MAX_IV_LENGTH              HIFN_AES_IV_LENGTH
 381
 382 #define HIFN_MAC_KEY_LENGTH             64
 383 #define HIFN_MD5_LENGTH                 16
 384 #define HIFN_SHA1_LENGTH                20
 385 #define HIFN_MAC_TRUNC_LENGTH           12
 386
 387 #define HIFN_MAX_COMMAND                (8 + 8 + 8 + 64 + 260)
 388 #define HIFN_MAX_RESULT                 (8 + 4 + 4 + 20 + 4)
 389 #define HIFN_USED_RESULT                12
 390
 391 struct hifn_desc
 392 {
 393         volatile __le32         l;
 394         volatile __le32         p;
 395 };
 396
 397 struct hifn_dma {
 398         struct hifn_desc        cmdr[HIFN_D_CMD_RSIZE+1];
 399         struct hifn_desc        srcr[HIFN_D_SRC_RSIZE+1];
 400         struct hifn_desc        dstr[HIFN_D_DST_RSIZE+1];
 401         struct hifn_desc        resr[HIFN_D_RES_RSIZE+1];
 402
 403         u8                      command_bufs[HIFN_D_CMD_RSIZE][HIFN_MAX_COMMAND];
 404         u8                      result_bufs[HIFN_D_CMD_RSIZE][HIFN_MAX_RESULT];
 405
 406         /*
 407          *  Our current positions for insertion and removal from the descriptor
 408          *  rings.
 409          */
 410         volatile int            cmdi, srci, dsti, resi;
 411         volatile int            cmdu, srcu, dstu, resu;
 412         int                     cmdk, srck, dstk, resk;
 413 };
 414
 415 #define HIFN_FLAG_CMD_BUSY      (1<<0)
 416 #define HIFN_FLAG_SRC_BUSY      (1<<1)
 417 #define HIFN_FLAG_DST_BUSY      (1<<2)
 418 #define HIFN_FLAG_RES_BUSY      (1<<3)
 419 #define HIFN_FLAG_OLD_KEY       (1<<4)
 420
 421 #define HIFN_DEFAULT_ACTIVE_NUM 5
 422
 423 struct hifn_device
 424 {
 425         char                    name[HIFN_NAMESIZE];
 426
 427         int                     irq;
 428
 429         struct pci_dev          *pdev;
 430         void __iomem            *bar[3];
 431
 432         void                    *desc_virt;
 433         dma_addr_t              desc_dma;
 434
 435         u32                     dmareg;
 436
 437         void                    *sa[HIFN_D_RES_RSIZE];
 438
 439         spinlock_t              lock;
 440
 441         u32                     flags;
 442         int                     active, started;
 443         struct delayed_work     work;
 444         unsigned long           reset;
 445         unsigned long           success;
 446         unsigned long           prev_success;
 447
 448         u8                      snum;
 449
 450         struct tasklet_struct   tasklet;
 451
 452         struct crypto_queue     queue;
 453         struct list_head        alg_list;
 454
 455         unsigned int            pk_clk_freq;
 456
 457 #ifdef CONFIG_CRYPTO_DEV_HIFN_795X_RNG
 458         unsigned int            rng_wait_time;
 459         ktime_t                 rngtime;
 460         struct hwrng            rng;
 461 #endif
 462 };
 463
 464 #define HIFN_D_LENGTH                   0x0000ffff
 465 #define HIFN_D_NOINVALID                0x01000000
 466 #define HIFN_D_MASKDONEIRQ              0x02000000
 467 #define HIFN_D_DESTOVER                 0x04000000
 468 #define HIFN_D_OVER                     0x08000000
 469 #define HIFN_D_LAST                     0x20000000
 470 #define HIFN_D_JUMP                     0x40000000
 471 #define HIFN_D_VALID                    0x80000000
 472
 473 struct hifn_base_command
 474 {
 475         volatile __le16         masks;
 476         volatile __le16         session_num;
 477         volatile __le16         total_source_count;
 478         volatile __le16         total_dest_count;
 479 };
 480
 481 #define HIFN_BASE_CMD_COMP              0x0100  /* enable compression engine */
 482 #define HIFN_BASE_CMD_PAD               0x0200  /* enable padding engine */
 483 #define HIFN_BASE_CMD_MAC               0x0400  /* enable MAC engine */
 484 #define HIFN_BASE_CMD_CRYPT             0x0800  /* enable crypt engine */
 485 #define HIFN_BASE_CMD_DECODE            0x2000
 486 #define HIFN_BASE_CMD_SRCLEN_M          0xc000
 487 #define HIFN_BASE_CMD_SRCLEN_S          14
 488 #define HIFN_BASE_CMD_DSTLEN_M          0x3000
 489 #define HIFN_BASE_CMD_DSTLEN_S          12
 490 #define HIFN_BASE_CMD_LENMASK_HI        0x30000
 491 #define HIFN_BASE_CMD_LENMASK_LO        0x0ffff
 492
 493 /*
 494  * Structure to help build up the command data structure.
 495  */
 496 struct hifn_crypt_command
 497 {
 498         volatile __le16                 masks;
 499         volatile __le16                 header_skip;
 500         volatile __le16                 source_count;
 501         volatile __le16                 reserved;
 502 };
 503
 504 #define HIFN_CRYPT_CMD_ALG_MASK         0x0003          /* algorithm: */
 505 #define HIFN_CRYPT_CMD_ALG_DES          0x0000          /*   DES */
 506 #define HIFN_CRYPT_CMD_ALG_3DES         0x0001          /*   3DES */
 507 #define HIFN_CRYPT_CMD_ALG_RC4          0x0002          /*   RC4 */
 508 #define HIFN_CRYPT_CMD_ALG_AES          0x0003          /*   AES */
 509 #define HIFN_CRYPT_CMD_MODE_MASK        0x0018          /* Encrypt mode: */
 510 #define HIFN_CRYPT_CMD_MODE_ECB         0x0000          /*   ECB */
 511 #define HIFN_CRYPT_CMD_MODE_CBC         0x0008          /*   CBC */
 512 #define HIFN_CRYPT_CMD_MODE_CFB         0x0010          /*   CFB */
 513 #define HIFN_CRYPT_CMD_MODE_OFB         0x0018          /*   OFB */
 514 #define HIFN_CRYPT_CMD_CLR_CTX          0x0040          /* clear context */
 515 #define HIFN_CRYPT_CMD_KSZ_MASK         0x0600          /* AES key size: */
 516 #define HIFN_CRYPT_CMD_KSZ_128          0x0000          /*  128 bit */
 517 #define HIFN_CRYPT_CMD_KSZ_192          0x0200          /*  192 bit */
 518 #define HIFN_CRYPT_CMD_KSZ_256          0x0400          /*  256 bit */
 519 #define HIFN_CRYPT_CMD_NEW_KEY          0x0800          /* expect new key */
 520 #define HIFN_CRYPT_CMD_NEW_IV           0x1000          /* expect new iv */
 521 #define HIFN_CRYPT_CMD_SRCLEN_M         0xc000
 522 #define HIFN_CRYPT_CMD_SRCLEN_S         14
 523
 524 /*
 525  * Structure to help build up the command data structure.
 526  */
 527 struct hifn_mac_command
 528 {
 529         volatile __le16         masks;
 530         volatile __le16         header_skip;
 531         volatile __le16         source_count;
 532         volatile __le16         reserved;
 533 };
 534
 535 #define HIFN_MAC_CMD_ALG_MASK           0x0001
 536 #define HIFN_MAC_CMD_ALG_SHA1           0x0000
 537 #define HIFN_MAC_CMD_ALG_MD5            0x0001
 538 #define HIFN_MAC_CMD_MODE_MASK          0x000c
 539 #define HIFN_MAC_CMD_MODE_HMAC          0x0000
 540 #define HIFN_MAC_CMD_MODE_SSL_MAC       0x0004
 541 #define HIFN_MAC_CMD_MODE_HASH          0x0008
 542 #define HIFN_MAC_CMD_MODE_FULL          0x0004
 543 #define HIFN_MAC_CMD_TRUNC              0x0010
 544 #define HIFN_MAC_CMD_RESULT             0x0020
 545 #define HIFN_MAC_CMD_APPEND             0x0040
 546 #define HIFN_MAC_CMD_SRCLEN_M           0xc000
 547 #define HIFN_MAC_CMD_SRCLEN_S           14
 548
 549 /*
 550  * MAC POS IPsec initiates authentication after encryption on encodes
 551  * and before decryption on decodes.
 552  */
 553 #define HIFN_MAC_CMD_POS_IPSEC          0x0200
 554 #define HIFN_MAC_CMD_NEW_KEY            0x0800
 555
 556 struct hifn_comp_command
 557 {
 558         volatile __le16         masks;
 559         volatile __le16         header_skip;
 560         volatile __le16         source_count;
 561         volatile __le16         reserved;
 562 };
 563
 564 #define HIFN_COMP_CMD_SRCLEN_M          0xc000
 565 #define HIFN_COMP_CMD_SRCLEN_S          14
 566 #define HIFN_COMP_CMD_ONE               0x0100  /* must be one */
 567 #define HIFN_COMP_CMD_CLEARHIST         0x0010  /* clear history */
 568 #define HIFN_COMP_CMD_UPDATEHIST        0x0008  /* update history */
 569 #define HIFN_COMP_CMD_LZS_STRIP0        0x0004  /* LZS: strip zero */
 570 #define HIFN_COMP_CMD_MPPC_RESTART      0x0004  /* MPPC: restart */
 571 #define HIFN_COMP_CMD_ALG_MASK          0x0001  /* compression mode: */
 572 #define HIFN_COMP_CMD_ALG_MPPC          0x0001  /*   MPPC */
 573 #define HIFN_COMP_CMD_ALG_LZS           0x0000  /*   LZS */
 574
 575 struct hifn_base_result
 576 {
 577         volatile __le16         flags;
 578         volatile __le16         session;
 579         volatile __le16         src_cnt;                /* 15:0 of source count */
 580         volatile __le16         dst_cnt;                /* 15:0 of dest count */
 581 };
 582
 583 #define HIFN_BASE_RES_DSTOVERRUN        0x0200  /* destination overrun */
 584 #define HIFN_BASE_RES_SRCLEN_M          0xc000  /* 17:16 of source count */
 585 #define HIFN_BASE_RES_SRCLEN_S          14
 586 #define HIFN_BASE_RES_DSTLEN_M          0x3000  /* 17:16 of dest count */
 587 #define HIFN_BASE_RES_DSTLEN_S          12
 588
 589 struct hifn_comp_result
 590 {
 591         volatile __le16         flags;
 592         volatile __le16         crc;
 593 };
 594
 595 #define HIFN_COMP_RES_LCB_M             0xff00  /* longitudinal check byte */
 596 #define HIFN_COMP_RES_LCB_S             8
 597 #define HIFN_COMP_RES_RESTART           0x0004  /* MPPC: restart */
 598 #define HIFN_COMP_RES_ENDMARKER         0x0002  /* LZS: end marker seen */
 599 #define HIFN_COMP_RES_SRC_NOTZERO       0x0001  /* source expired */
 600
 601 struct hifn_mac_result
 602 {
 603         volatile __le16         flags;
 604         volatile __le16         reserved;
 605         /* followed by 0, 6, 8, or 10 u16's of the MAC, then crypt */
 606 };
 607
 608 #define HIFN_MAC_RES_MISCOMPARE         0x0002  /* compare failed */
 609 #define HIFN_MAC_RES_SRC_NOTZERO        0x0001  /* source expired */
 610
 611 struct hifn_crypt_result
 612 {
 613         volatile __le16         flags;
 614         volatile __le16         reserved;
 615 };
 616
 617 #define HIFN_CRYPT_RES_SRC_NOTZERO      0x0001  /* source expired */
 618
 619 #ifndef HIFN_POLL_FREQUENCY
 620 #define HIFN_POLL_FREQUENCY     0x1
 621 #endif
 622
 623 #ifndef HIFN_POLL_SCALAR
 624 #define HIFN_POLL_SCALAR        0x0
 625 #endif
 626
 627 #define HIFN_MAX_SEGLEN         0xffff          /* maximum dma segment len */
 628 #define HIFN_MAX_DMALEN         0x3ffff         /* maximum dma length */
 629
 630 struct hifn_crypto_alg
 631 {
 632         struct list_head        entry;
 633         struct crypto_alg       alg;
 634         struct hifn_device      *dev;
 635 };
 636
 637 #define ASYNC_SCATTERLIST_CACHE 16
 638
 639 #define ASYNC_FLAGS_MISALIGNED  (1<<0)
 640
 641 struct hifn_cipher_walk
 642 {
 643         struct scatterlist      cache[ASYNC_SCATTERLIST_CACHE];
 644         u32                     flags;
 645         int                     num;
 646 };
 647
 648 struct hifn_context
 649 {
 650         u8                      key[HIFN_MAX_CRYPT_KEY_LENGTH];
 651         struct hifn_device      *dev;
 652         unsigned int            keysize;
 653 };
 654
 655 struct hifn_request_context
 656 {
 657         u8                      *iv;
 658         unsigned int            ivsize;
 659         u8                      op, type, mode, unused;
 660         struct hifn_cipher_walk walk;
 661 };
 662
 663 #define crypto_alg_to_hifn(a)   container_of(a, struct hifn_crypto_alg, alg)
 664
 665 static inline u32 hifn_read_0(struct hifn_device *dev, u32 reg)
 666 {
 667         u32 ret;
 668
 669         ret = readl(dev->bar[0] + reg);
 670
 671         return ret;
 672 }
 673
 674 static inline u32 hifn_read_1(struct hifn_device *dev, u32 reg)
 675 {
 676         u32 ret;
 677
 678         ret = readl(dev->bar[1] + reg);
 679
 680         return ret;
 681 }
 682
 683 static inline void hifn_write_0(struct hifn_device *dev, u32 reg, u32 val)
 684 {
 685         writel((__force u32)cpu_to_le32(val), dev->bar[0] + reg);
 686 }
 687
 688 static inline void hifn_write_1(struct hifn_device *dev, u32 reg, u32 val)
 689 {
 690         writel((__force u32)cpu_to_le32(val), dev->bar[1] + reg);
 691 }
 692
 693 static void hifn_wait_puc(struct hifn_device *dev)
 694 {
 695         int i;
 696         u32 ret;
 697
 698         for (i=10000; i > 0; --i) {
 699                 ret = hifn_read_0(dev, HIFN_0_PUCTRL);
 700                 if (!(ret & HIFN_PUCTRL_RESET))
 701                         break;
 702
 703                 udelay(1);
 704         }
 705
 706         if (!i)
 707                 dprintk("%s: Failed to reset PUC unit.\n", dev->name);
 708 }
 709
 710 static void hifn_reset_puc(struct hifn_device *dev)
 711 {
 712         hifn_write_0(dev, HIFN_0_PUCTRL, HIFN_PUCTRL_DMAENA);
 713         hifn_wait_puc(dev);
 714 }
 715
 716 static void hifn_stop_device(struct hifn_device *dev)
 717 {
 718         hifn_write_1(dev, HIFN_1_DMA_CSR,
 719                 HIFN_DMACSR_D_CTRL_DIS | HIFN_DMACSR_R_CTRL_DIS |
 720                 HIFN_DMACSR_S_CTRL_DIS | HIFN_DMACSR_C_CTRL_DIS);
 721         hifn_write_0(dev, HIFN_0_PUIER, 0);
 722         hifn_write_1(dev, HIFN_1_DMA_IER, 0);
 723 }
 724
 725 static void hifn_reset_dma(struct hifn_device *dev, int full)
 726 {
 727         hifn_stop_device(dev);
 728
 729         /*
 730          * Setting poll frequency and others to 0.
 731          */
 732         hifn_write_1(dev, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
 733                         HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
 734         mdelay(1);
 735
 736         /*
 737          * Reset DMA.
 738          */
 739         if (full) {
 740                 hifn_write_1(dev, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MODE);
 741                 mdelay(1);
 742         } else {
 743                 hifn_write_1(dev, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MODE |
 744                                 HIFN_DMACNFG_MSTRESET);
 745                 hifn_reset_puc(dev);
 746         }
 747
 748         hifn_write_1(dev, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
 749                         HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
 750
 751         hifn_reset_puc(dev);
 752 }
 753
 754 static u32 hifn_next_signature(u_int32_t a, u_int cnt)
 755 {
 756         int i;
 757         u32 v;
 758
 759         for (i = 0; i < cnt; i++) {
 760
 761                 /* get the parity */
 762                 v = a & 0x80080125;
 763                 v ^= v >> 16;
 764                 v ^= v >> 8;
 765                 v ^= v >> 4;
 766                 v ^= v >> 2;
 767                 v ^= v >> 1;
 768
 769                 a = (v & 1) ^ (a << 1);
 770         }
 771
 772         return a;
 773 }
 774
 775 static struct pci2id {
 776         u_short         pci_vendor;
 777         u_short         pci_prod;
 778         char            card_id[13];
 779 } pci2id[] = {
 780         {
 781                 PCI_VENDOR_ID_HIFN,
 782                 PCI_DEVICE_ID_HIFN_7955,
 783                 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 784                   0x00, 0x00, 0x00, 0x00, 0x00 }
 785         },
 786         {
 787                 PCI_VENDOR_ID_HIFN,
 788                 PCI_DEVICE_ID_HIFN_7956,
 789                 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 790                   0x00, 0x00, 0x00, 0x00, 0x00 }
 791         }
 792 };
 793
 794 #ifdef CONFIG_CRYPTO_DEV_HIFN_795X_RNG
 795 static int hifn_rng_data_present(struct hwrng *rng, int wait)
 796 {
 797         struct hifn_device *dev = (struct hifn_device *)rng->priv;
 798         s64 nsec;
 799
 800         nsec = ktime_to_ns(ktime_sub(ktime_get(), dev->rngtime));
 801         nsec -= dev->rng_wait_time;
 802         if (nsec <= 0)
 803                 return 1;
 804         if (!wait)
 805                 return 0;
 806         ndelay(nsec);
 807         return 1;
 808 }
 809
 810 static int hifn_rng_data_read(struct hwrng *rng, u32 *data)
 811 {
 812         struct hifn_device *dev = (struct hifn_device *)rng->priv;
 813
 814         *data = hifn_read_1(dev, HIFN_1_RNG_DATA);
 815         dev->rngtime = ktime_get();
 816         return 4;
 817 }
 818
 819 static int hifn_register_rng(struct hifn_device *dev)
 820 {
 821         /*
 822          * We must wait at least 256 Pk_clk cycles between two reads of the rng.
 823          */
 824         dev->rng_wait_time      = DIV_ROUND_UP_ULL(NSEC_PER_SEC,
 825                                                    dev->pk_clk_freq) * 256;
 826
 827         dev->rng.name           = dev->name;
 828         dev->rng.data_present   = hifn_rng_data_present,
 829         dev->rng.data_read      = hifn_rng_data_read,
 830         dev->rng.priv           = (unsigned long)dev;
 831
 832         return hwrng_register(&dev->rng);
 833 }
 834
 835 static void hifn_unregister_rng(struct hifn_device *dev)
 836 {
 837         hwrng_unregister(&dev->rng);
 838 }
 839 #else
 840 #define hifn_register_rng(dev)          0
 841 #define hifn_unregister_rng(dev)
 842 #endif
 843
 844 static int hifn_init_pubrng(struct hifn_device *dev)
 845 {
 846         int i;
 847
 848         hifn_write_1(dev, HIFN_1_PUB_RESET, hifn_read_1(dev, HIFN_1_PUB_RESET) |
 849                         HIFN_PUBRST_RESET);
 850
 851         for (i=100; i > 0; --i) {
 852                 mdelay(1);
 853
 854                 if ((hifn_read_1(dev, HIFN_1_PUB_RESET) & HIFN_PUBRST_RESET) == 0)
 855                         break;
 856         }
 857
 858         if (!i)
 859                 dprintk("Chip %s: Failed to initialise public key engine.\n",
 860                                 dev->name);
 861         else {
 862                 hifn_write_1(dev, HIFN_1_PUB_IEN, HIFN_PUBIEN_DONE);
 863                 dev->dmareg |= HIFN_DMAIER_PUBDONE;
 864                 hifn_write_1(dev, HIFN_1_DMA_IER, dev->dmareg);
 865
 866                 dprintk("Chip %s: Public key engine has been successfully "
 867                                 "initialised.\n", dev->name);
 868         }
 869
 870         /*
 871          * Enable RNG engine.
 872          */
 873
 874         hifn_write_1(dev, HIFN_1_RNG_CONFIG,
 875                         hifn_read_1(dev, HIFN_1_RNG_CONFIG) | HIFN_RNGCFG_ENA);
 876         dprintk("Chip %s: RNG engine has been successfully initialised.\n",
 877                         dev->name);
 878
 879 #ifdef CONFIG_CRYPTO_DEV_HIFN_795X_RNG
 880         /* First value must be discarded */
 881         hifn_read_1(dev, HIFN_1_RNG_DATA);
 882         dev->rngtime = ktime_get();
 883 #endif
 884         return 0;
 885 }
 886
 887 static int hifn_enable_crypto(struct hifn_device *dev)
 888 {
 889         u32 dmacfg, addr;
 890         char *offtbl = NULL;
 891         int i;
 892
 893         for (i = 0; i < ARRAY_SIZE(pci2id); i++) {
 894                 if (pci2id[i].pci_vendor == dev->pdev->vendor &&
 895                                 pci2id[i].pci_prod == dev->pdev->device) {
 896                         offtbl = pci2id[i].card_id;
 897                         break;
 898                 }
 899         }
 900
 901         if (offtbl == NULL) {
 902                 dprintk("Chip %s: Unknown card!\n", dev->name);
 903                 return -ENODEV;
 904         }
 905
 906         dmacfg = hifn_read_1(dev, HIFN_1_DMA_CNFG);
 907
 908         hifn_write_1(dev, HIFN_1_DMA_CNFG,
 909                         HIFN_DMACNFG_UNLOCK | HIFN_DMACNFG_MSTRESET |
 910                         HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
 911         mdelay(1);
 912         addr = hifn_read_1(dev, HIFN_1_UNLOCK_SECRET1);
 913         mdelay(1);
 914         hifn_write_1(dev, HIFN_1_UNLOCK_SECRET2, 0);
 915         mdelay(1);
 916
 917         for (i=0; i<12; ++i) {
 918                 addr = hifn_next_signature(addr, offtbl[i] + 0x101);
 919                 hifn_write_1(dev, HIFN_1_UNLOCK_SECRET2, addr);
 920
 921                 mdelay(1);
 922         }
 923         hifn_write_1(dev, HIFN_1_DMA_CNFG, dmacfg);
 924
 925         dprintk("Chip %s: %s.\n", dev->name, pci_name(dev->pdev));
 926
 927         return 0;
 928 }
 929
 930 static void hifn_init_dma(struct hifn_device *dev)
 931 {
 932         struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
 933         u32 dptr = dev->desc_dma;
 934         int i;
 935
 936         for (i=0; i<HIFN_D_CMD_RSIZE; ++i)
 937                 dma->cmdr[i].p = __cpu_to_le32(dptr +
 938                                 offsetof(struct hifn_dma, command_bufs[i][0]));
 939         for (i=0; i<HIFN_D_RES_RSIZE; ++i)
 940                 dma->resr[i].p = __cpu_to_le32(dptr +
 941                                 offsetof(struct hifn_dma, result_bufs[i][0]));
 942
 943         /*
 944          * Setup LAST descriptors.
 945          */
 946         dma->cmdr[HIFN_D_CMD_RSIZE].p = __cpu_to_le32(dptr +
 947                         offsetof(struct hifn_dma, cmdr[0]));
 948         dma->srcr[HIFN_D_SRC_RSIZE].p = __cpu_to_le32(dptr +
 949                         offsetof(struct hifn_dma, srcr[0]));
 950         dma->dstr[HIFN_D_DST_RSIZE].p = __cpu_to_le32(dptr +
 951                         offsetof(struct hifn_dma, dstr[0]));
 952         dma->resr[HIFN_D_RES_RSIZE].p = __cpu_to_le32(dptr +
 953                         offsetof(struct hifn_dma, resr[0]));
 954
 955         dma->cmdu = dma->srcu = dma->dstu = dma->resu = 0;
 956         dma->cmdi = dma->srci = dma->dsti = dma->resi = 0;
 957         dma->cmdk = dma->srck = dma->dstk = dma->resk = 0;
 958 }
 959
 960 /*
 961  * Initialize the PLL. We need to know the frequency of the reference clock
 962  * to calculate the optimal multiplier. For PCI we assume 66MHz, since that
 963  * allows us to operate without the risk of overclocking the chip. If it
 964  * actually uses 33MHz, the chip will operate at half the speed, this can be
 965  * overriden by specifying the frequency as module parameter (pci33).
 966  *
 967  * Unfortunately the PCI clock is not very suitable since the HIFN needs a
 968  * stable clock and the PCI clock frequency may vary, so the default is the
 969  * external clock. There is no way to find out its frequency, we default to
 970  * 66MHz since according to Mike Ham of HiFn, almost every board in existence
 971  * has an external crystal populated at 66MHz.
 972  */
 973 static void hifn_init_pll(struct hifn_device *dev)
 974 {
 975         unsigned int freq, m;
 976         u32 pllcfg;
 977
 978         pllcfg = HIFN_1_PLL | HIFN_PLL_RESERVED_1;
 979
 980         if (strncmp(hifn_pll_ref, "ext", 3) == 0)
 981                 pllcfg |= HIFN_PLL_REF_CLK_PLL;
 982         else
 983                 pllcfg |= HIFN_PLL_REF_CLK_HBI;
 984
 985         if (hifn_pll_ref[3] != '\0')
 986                 freq = simple_strtoul(hifn_pll_ref + 3, NULL, 10);
 987         else {
 988                 freq = 66;
 989                 printk(KERN_INFO "hifn795x: assuming %uMHz clock speed, "
 990                                  "override with hifn_pll_ref=%.3s<frequency>\n",
 991                        freq, hifn_pll_ref);
 992         }
 993
 994         m = HIFN_PLL_FCK_MAX / freq;
 995
 996         pllcfg |= (m / 2 - 1) << HIFN_PLL_ND_SHIFT;
 997         if (m <= 8)
 998                 pllcfg |= HIFN_PLL_IS_1_8;
 999         else
1000                 pllcfg |= HIFN_PLL_IS_9_12;
1001
1002         /* Select clock source and enable clock bypass */
1003         hifn_write_1(dev, HIFN_1_PLL, pllcfg |
1004                      HIFN_PLL_PK_CLK_HBI | HIFN_PLL_PE_CLK_HBI | HIFN_PLL_BP);
1005
1006         /* Let the chip lock to the input clock */
1007         mdelay(10);
1008
1009         /* Disable clock bypass */
1010         hifn_write_1(dev, HIFN_1_PLL, pllcfg |
1011                      HIFN_PLL_PK_CLK_HBI | HIFN_PLL_PE_CLK_HBI);
1012
1013         /* Switch the engines to the PLL */
1014         hifn_write_1(dev, HIFN_1_PLL, pllcfg |
1015                      HIFN_PLL_PK_CLK_PLL | HIFN_PLL_PE_CLK_PLL);
1016
1017         /*
1018          * The Fpk_clk runs at half the total speed. Its frequency is needed to
1019          * calculate the minimum time between two reads of the rng. Since 33MHz
1020          * is actually 33.333... we overestimate the frequency here, resulting
1021          * in slightly larger intervals.
1022          */
1023         dev->pk_clk_freq = 1000000 * (freq + 1) * m / 2;
1024 }
1025
1026 static void hifn_init_registers(struct hifn_device *dev)
1027 {
1028         u32 dptr = dev->desc_dma;
1029
1030         /* Initialization magic... */
1031         hifn_write_0(dev, HIFN_0_PUCTRL, HIFN_PUCTRL_DMAENA);
1032         hifn_write_0(dev, HIFN_0_FIFOCNFG, HIFN_FIFOCNFG_THRESHOLD);
1033         hifn_write_0(dev, HIFN_0_PUIER, HIFN_PUIER_DSTOVER);
1034
1035         /* write all 4 ring address registers */
1036         hifn_write_1(dev, HIFN_1_DMA_CRAR, dptr +
1037                                 offsetof(struct hifn_dma, cmdr[0]));
1038         hifn_write_1(dev, HIFN_1_DMA_SRAR, dptr +
1039                                 offsetof(struct hifn_dma, srcr[0]));
1040         hifn_write_1(dev, HIFN_1_DMA_DRAR, dptr +
1041                                 offsetof(struct hifn_dma, dstr[0]));
1042         hifn_write_1(dev, HIFN_1_DMA_RRAR, dptr +
1043                                 offsetof(struct hifn_dma, resr[0]));
1044
1045         mdelay(2);
1046 #if 0
1047         hifn_write_1(dev, HIFN_1_DMA_CSR,
1048             HIFN_DMACSR_D_CTRL_DIS | HIFN_DMACSR_R_CTRL_DIS |
1049             HIFN_DMACSR_S_CTRL_DIS | HIFN_DMACSR_C_CTRL_DIS |
1050             HIFN_DMACSR_D_ABORT | HIFN_DMACSR_D_DONE | HIFN_DMACSR_D_LAST |
1051             HIFN_DMACSR_D_WAIT | HIFN_DMACSR_D_OVER |
1052             HIFN_DMACSR_R_ABORT | HIFN_DMACSR_R_DONE | HIFN_DMACSR_R_LAST |
1053             HIFN_DMACSR_R_WAIT | HIFN_DMACSR_R_OVER |
1054             HIFN_DMACSR_S_ABORT | HIFN_DMACSR_S_DONE | HIFN_DMACSR_S_LAST |
1055             HIFN_DMACSR_S_WAIT |
1056             HIFN_DMACSR_C_ABORT | HIFN_DMACSR_C_DONE | HIFN_DMACSR_C_LAST |
1057             HIFN_DMACSR_C_WAIT |
1058             HIFN_DMACSR_ENGINE |
1059             HIFN_DMACSR_PUBDONE);
1060 #else
1061         hifn_write_1(dev, HIFN_1_DMA_CSR,
1062             HIFN_DMACSR_C_CTRL_ENA | HIFN_DMACSR_S_CTRL_ENA |
1063             HIFN_DMACSR_D_CTRL_ENA | HIFN_DMACSR_R_CTRL_ENA |
1064             HIFN_DMACSR_D_ABORT | HIFN_DMACSR_D_DONE | HIFN_DMACSR_D_LAST |
1065             HIFN_DMACSR_D_WAIT | HIFN_DMACSR_D_OVER |
1066             HIFN_DMACSR_R_ABORT | HIFN_DMACSR_R_DONE | HIFN_DMACSR_R_LAST |
1067             HIFN_DMACSR_R_WAIT | HIFN_DMACSR_R_OVER |
1068             HIFN_DMACSR_S_ABORT | HIFN_DMACSR_S_DONE | HIFN_DMACSR_S_LAST |
1069             HIFN_DMACSR_S_WAIT |
1070             HIFN_DMACSR_C_ABORT | HIFN_DMACSR_C_DONE | HIFN_DMACSR_C_LAST |
1071             HIFN_DMACSR_C_WAIT |
1072             HIFN_DMACSR_ENGINE |
1073             HIFN_DMACSR_PUBDONE);
1074 #endif
1075         hifn_read_1(dev, HIFN_1_DMA_CSR);
1076
1077         dev->dmareg |= HIFN_DMAIER_R_DONE | HIFN_DMAIER_C_ABORT |
1078             HIFN_DMAIER_D_OVER | HIFN_DMAIER_R_OVER |
1079             HIFN_DMAIER_S_ABORT | HIFN_DMAIER_D_ABORT | HIFN_DMAIER_R_ABORT |
1080             HIFN_DMAIER_ENGINE;
1081         dev->dmareg &= ~HIFN_DMAIER_C_WAIT;
1082
1083         hifn_write_1(dev, HIFN_1_DMA_IER, dev->dmareg);
1084         hifn_read_1(dev, HIFN_1_DMA_IER);
1085 #if 0
1086         hifn_write_0(dev, HIFN_0_PUCNFG, HIFN_PUCNFG_ENCCNFG |
1087                     HIFN_PUCNFG_DRFR_128 | HIFN_PUCNFG_TCALLPHASES |
1088                     HIFN_PUCNFG_TCDRVTOTEM | HIFN_PUCNFG_BUS32 |
1089                     HIFN_PUCNFG_DRAM);
1090 #else
1091         hifn_write_0(dev, HIFN_0_PUCNFG, 0x10342);
1092 #endif
1093         hifn_init_pll(dev);
1094
1095         hifn_write_0(dev, HIFN_0_PUISR, HIFN_PUISR_DSTOVER);
1096         hifn_write_1(dev, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
1097             HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE | HIFN_DMACNFG_LAST |
1098             ((HIFN_POLL_FREQUENCY << 16 ) & HIFN_DMACNFG_POLLFREQ) |
1099             ((HIFN_POLL_SCALAR << 8) & HIFN_DMACNFG_POLLINVAL));
1100 }
1101
1102 static int hifn_setup_base_command(struct hifn_device *dev, u8 *buf,
1103                 unsigned dlen, unsigned slen, u16 mask, u8 snum)
1104 {
1105         struct hifn_base_command *base_cmd;
1106         u8 *buf_pos = buf;
1107
1108         base_cmd = (struct hifn_base_command *)buf_pos;
1109         base_cmd->masks = __cpu_to_le16(mask);
1110         base_cmd->total_source_count =
1111                 __cpu_to_le16(slen & HIFN_BASE_CMD_LENMASK_LO);
1112         base_cmd->total_dest_count =
1113                 __cpu_to_le16(dlen & HIFN_BASE_CMD_LENMASK_LO);
1114
1115         dlen >>= 16;
1116         slen >>= 16;
1117         base_cmd->session_num = __cpu_to_le16(snum |
1118             ((slen << HIFN_BASE_CMD_SRCLEN_S) & HIFN_BASE_CMD_SRCLEN_M) |
1119             ((dlen << HIFN_BASE_CMD_DSTLEN_S) & HIFN_BASE_CMD_DSTLEN_M));
1120
1121         return sizeof(struct hifn_base_command);
1122 }
1123
1124 static int hifn_setup_crypto_command(struct hifn_device *dev,
1125                 u8 *buf, unsigned dlen, unsigned slen,
1126                 u8 *key, int keylen, u8 *iv, int ivsize, u16 mode)
1127 {
1128         struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
1129         struct hifn_crypt_command *cry_cmd;
1130         u8 *buf_pos = buf;
1131         u16 cmd_len;
1132
1133         cry_cmd = (struct hifn_crypt_command *)buf_pos;
1134
1135         cry_cmd->source_count = __cpu_to_le16(dlen & 0xffff);
1136         dlen >>= 16;
1137         cry_cmd->masks = __cpu_to_le16(mode |
1138                         ((dlen << HIFN_CRYPT_CMD_SRCLEN_S) &
1139                          HIFN_CRYPT_CMD_SRCLEN_M));
1140         cry_cmd->header_skip = 0;
1141         cry_cmd->reserved = 0;
1142
1143         buf_pos += sizeof(struct hifn_crypt_command);
1144
1145         dma->cmdu++;
1146         if (dma->cmdu > 1) {
1147                 dev->dmareg |= HIFN_DMAIER_C_WAIT;
1148                 hifn_write_1(dev, HIFN_1_DMA_IER, dev->dmareg);
1149         }
1150
1151         if (keylen) {
1152                 memcpy(buf_pos, key, keylen);
1153                 buf_pos += keylen;
1154         }
1155         if (ivsize) {
1156                 memcpy(buf_pos, iv, ivsize);
1157                 buf_pos += ivsize;
1158         }
1159
1160         cmd_len = buf_pos - buf;
1161
1162         return cmd_len;
1163 }
1164
1165 static int hifn_setup_cmd_desc(struct hifn_device *dev,
1166                 struct hifn_context *ctx, struct hifn_request_context *rctx,
1167                 void *priv, unsigned int nbytes)
1168 {
1169         struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
1170         int cmd_len, sa_idx;
1171         u8 *buf, *buf_pos;
1172         u16 mask;
1173
1174         sa_idx = dma->cmdi;
1175         buf_pos = buf = dma->command_bufs[dma->cmdi];
1176
1177         mask = 0;
1178         switch (rctx->op) {
1179                 case ACRYPTO_OP_DECRYPT:
1180                         mask = HIFN_BASE_CMD_CRYPT | HIFN_BASE_CMD_DECODE;
1181                         break;
1182                 case ACRYPTO_OP_ENCRYPT:
1183                         mask = HIFN_BASE_CMD_CRYPT;
1184                         break;
1185                 case ACRYPTO_OP_HMAC:
1186                         mask = HIFN_BASE_CMD_MAC;
1187                         break;
1188                 default:
1189                         goto err_out;
1190         }
1191
1192         buf_pos += hifn_setup_base_command(dev, buf_pos, nbytes,
1193                         nbytes, mask, dev->snum);
1194
1195         if (rctx->op == ACRYPTO_OP_ENCRYPT || rctx->op == ACRYPTO_OP_DECRYPT) {
1196                 u16 md = 0;
1197
1198                 if (ctx->keysize)
1199                         md |= HIFN_CRYPT_CMD_NEW_KEY;
1200                 if (rctx->iv && rctx->mode != ACRYPTO_MODE_ECB)
1201                         md |= HIFN_CRYPT_CMD_NEW_IV;
1202
1203                 switch (rctx->mode) {
1204                         case ACRYPTO_MODE_ECB:
1205                                 md |= HIFN_CRYPT_CMD_MODE_ECB;
1206                                 break;
1207                         case ACRYPTO_MODE_CBC:
1208                                 md |= HIFN_CRYPT_CMD_MODE_CBC;
1209                                 break;
1210                         case ACRYPTO_MODE_CFB:
1211                                 md |= HIFN_CRYPT_CMD_MODE_CFB;
1212                                 break;
1213                         case ACRYPTO_MODE_OFB:
1214                                 md |= HIFN_CRYPT_CMD_MODE_OFB;
1215                                 break;
1216                         default:
1217                                 goto err_out;
1218                 }
1219
1220                 switch (rctx->type) {
1221                         case ACRYPTO_TYPE_AES_128:
1222                                 if (ctx->keysize != 16)
1223                                         goto err_out;
1224                                 md |= HIFN_CRYPT_CMD_KSZ_128 |
1225                                         HIFN_CRYPT_CMD_ALG_AES;
1226                                 break;
1227                         case ACRYPTO_TYPE_AES_192:
1228                                 if (ctx->keysize != 24)
1229                                         goto err_out;
1230                                 md |= HIFN_CRYPT_CMD_KSZ_192 |
1231                                         HIFN_CRYPT_CMD_ALG_AES;
1232                                 break;
1233                         case ACRYPTO_TYPE_AES_256:
1234                                 if (ctx->keysize != 32)
1235                                         goto err_out;
1236                                 md |= HIFN_CRYPT_CMD_KSZ_256 |
1237                                         HIFN_CRYPT_CMD_ALG_AES;
1238                                 break;
1239                         case ACRYPTO_TYPE_3DES:
1240                                 if (ctx->keysize != 24)
1241                                         goto err_out;
1242                                 md |= HIFN_CRYPT_CMD_ALG_3DES;
1243                                 break;
1244                         case ACRYPTO_TYPE_DES:
1245                                 if (ctx->keysize != 8)
1246                                         goto err_out;
1247                                 md |= HIFN_CRYPT_CMD_ALG_DES;
1248                                 break;
1249                         default:
1250                                 goto err_out;
1251                 }
1252
1253                 buf_pos += hifn_setup_crypto_command(dev, buf_pos,
1254                                 nbytes, nbytes, ctx->key, ctx->keysize,
1255                                 rctx->iv, rctx->ivsize, md);
1256         }
1257
1258         dev->sa[sa_idx] = priv;
1259         dev->started++;
1260
1261         cmd_len = buf_pos - buf;
1262         dma->cmdr[dma->cmdi].l = __cpu_to_le32(cmd_len | HIFN_D_VALID |
1263                         HIFN_D_LAST | HIFN_D_MASKDONEIRQ);
1264
1265         if (++dma->cmdi == HIFN_D_CMD_RSIZE) {
1266                 dma->cmdr[dma->cmdi].l = __cpu_to_le32(
1267                         HIFN_D_VALID | HIFN_D_LAST |
1268                         HIFN_D_MASKDONEIRQ | HIFN_D_JUMP);
1269                 dma->cmdi = 0;
1270         } else
1271                 dma->cmdr[dma->cmdi-1].l |= __cpu_to_le32(HIFN_D_VALID);
1272
1273         if (!(dev->flags & HIFN_FLAG_CMD_BUSY)) {
1274                 hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_C_CTRL_ENA);
1275                 dev->flags |= HIFN_FLAG_CMD_BUSY;
1276         }
1277         return 0;
1278
1279 err_out:
1280         return -EINVAL;
1281 }
1282
1283 static int hifn_setup_src_desc(struct hifn_device *dev, struct page *page,
1284                 unsigned int offset, unsigned int size, int last)
1285 {
1286         struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
1287         int idx;
1288         dma_addr_t addr;
1289
1290         addr = pci_map_page(dev->pdev, page, offset, size, PCI_DMA_TODEVICE);
1291
1292         idx = dma->srci;
1293
1294         dma->srcr[idx].p = __cpu_to_le32(addr);
1295         dma->srcr[idx].l = __cpu_to_le32(size | HIFN_D_VALID |
1296                         HIFN_D_MASKDONEIRQ | (last ? HIFN_D_LAST : 0));
1297
1298         if (++idx == HIFN_D_SRC_RSIZE) {
1299                 dma->srcr[idx].l = __cpu_to_le32(HIFN_D_VALID |
1300                                 HIFN_D_JUMP | HIFN_D_MASKDONEIRQ |
1301                                 (last ? HIFN_D_LAST : 0));
1302                 idx = 0;
1303         }
1304
1305         dma->srci = idx;
1306         dma->srcu++;
1307
1308         if (!(dev->flags & HIFN_FLAG_SRC_BUSY)) {
1309                 hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_S_CTRL_ENA);
1310                 dev->flags |= HIFN_FLAG_SRC_BUSY;
1311         }
1312
1313         return size;
1314 }
1315
1316 static void hifn_setup_res_desc(struct hifn_device *dev)
1317 {
1318         struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
1319
1320         dma->resr[dma->resi].l = __cpu_to_le32(HIFN_USED_RESULT |
1321                         HIFN_D_VALID | HIFN_D_LAST);
1322         /*
1323          * dma->resr[dma->resi].l = __cpu_to_le32(HIFN_MAX_RESULT | HIFN_D_VALID |
1324          *                                      HIFN_D_LAST);
1325          */
1326
1327         if (++dma->resi == HIFN_D_RES_RSIZE) {
1328                 dma->resr[HIFN_D_RES_RSIZE].l = __cpu_to_le32(HIFN_D_VALID |
1329                                 HIFN_D_JUMP | HIFN_D_MASKDONEIRQ | HIFN_D_LAST);
1330                 dma->resi = 0;
1331         }
1332
1333         dma->resu++;
1334
1335         if (!(dev->flags & HIFN_FLAG_RES_BUSY)) {
1336                 hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_R_CTRL_ENA);
1337                 dev->flags |= HIFN_FLAG_RES_BUSY;
1338         }
1339 }
1340
1341 static void hifn_setup_dst_desc(struct hifn_device *dev, struct page *page,
1342                 unsigned offset, unsigned size, int last)
1343 {
1344         struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
1345         int idx;
1346         dma_addr_t addr;
1347
1348         addr = pci_map_page(dev->pdev, page, offset, size, PCI_DMA_FROMDEVICE);
1349
1350         idx = dma->dsti;
1351         dma->dstr[idx].p = __cpu_to_le32(addr);
1352         dma->dstr[idx].l = __cpu_to_le32(size | HIFN_D_VALID |
1353                         HIFN_D_MASKDONEIRQ | (last ? HIFN_D_LAST : 0));
1354
1355         if (++idx == HIFN_D_DST_RSIZE) {
1356                 dma->dstr[idx].l = __cpu_to_le32(HIFN_D_VALID |
1357                                 HIFN_D_JUMP | HIFN_D_MASKDONEIRQ |
1358                                 (last ? HIFN_D_LAST : 0));
1359                 idx = 0;
1360         }
1361         dma->dsti = idx;
1362         dma->dstu++;
1363
1364         if (!(dev->flags & HIFN_FLAG_DST_BUSY)) {
1365                 hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_D_CTRL_ENA);
1366                 dev->flags |= HIFN_FLAG_DST_BUSY;
1367         }
1368 }
1369
1370 static int hifn_setup_dma(struct hifn_device *dev,
1371                 struct hifn_context *ctx, struct hifn_request_context *rctx,
1372                 struct scatterlist *src, struct scatterlist *dst,
1373                 unsigned int nbytes, void *priv)
1374 {
1375         struct scatterlist *t;
1376         struct page *spage, *dpage;
1377         unsigned int soff, doff;
1378         unsigned int n, len;
1379
1380         n = nbytes;
1381         while (n) {
1382                 spage = sg_page(src);
1383                 soff = src->offset;
1384                 len = min(src->length, n);
1385
1386                 hifn_setup_src_desc(dev, spage, soff, len, n - len == 0);
1387
1388                 src++;
1389                 n -= len;
1390         }
1391
1392         t = &rctx->walk.cache[0];
1393         n = nbytes;
1394         while (n) {
1395                 if (t->length && rctx->walk.flags & ASYNC_FLAGS_MISALIGNED) {
1396                         BUG_ON(!sg_page(t));
1397                         dpage = sg_page(t);
1398                         doff = 0;
1399                         len = t->length;
1400                 } else {
1401                         BUG_ON(!sg_page(dst));
1402                         dpage = sg_page(dst);
1403                         doff = dst->offset;
1404                         len = dst->length;
1405                 }
1406                 len = min(len, n);
1407
1408                 hifn_setup_dst_desc(dev, dpage, doff, len, n - len == 0);
1409
1410                 dst++;
1411                 t++;
1412                 n -= len;
1413         }
1414
1415         hifn_setup_cmd_desc(dev, ctx, rctx, priv, nbytes);
1416         hifn_setup_res_desc(dev);
1417         return 0;
1418 }
1419
1420 static int hifn_cipher_walk_init(struct hifn_cipher_walk *w,
1421                 int num, gfp_t gfp_flags)
1422 {
1423         int i;
1424
1425         num = min(ASYNC_SCATTERLIST_CACHE, num);
1426         sg_init_table(w->cache, num);
1427
1428         w->num = 0;
1429         for (i=0; i<num; ++i) {
1430                 struct page *page = alloc_page(gfp_flags);
1431                 struct scatterlist *s;
1432
1433                 if (!page)
1434                         break;
1435
1436                 s = &w->cache[i];
1437
1438                 sg_set_page(s, page, PAGE_SIZE, 0);
1439                 w->num++;
1440         }
1441
1442         return i;
1443 }
1444
1445 static void hifn_cipher_walk_exit(struct hifn_cipher_walk *w)
1446 {
1447         int i;
1448
1449         for (i=0; i<w->num; ++i) {
1450                 struct scatterlist *s = &w->cache[i];
1451
1452                 __free_page(sg_page(s));
1453
1454                 s->length = 0;
1455         }
1456
1457         w->num = 0;
1458 }
1459
1460 static int ablkcipher_add(unsigned int *drestp, struct scatterlist *dst,
1461                 unsigned int size, unsigned int *nbytesp)
1462 {
1463         unsigned int copy, drest = *drestp, nbytes = *nbytesp;
1464         int idx = 0;
1465
1466         if (drest < size || size > nbytes)
1467                 return -EINVAL;
1468
1469         while (size) {
1470                 copy = min3(drest, size, dst->length);
1471
1472                 size -= copy;
1473                 drest -= copy;
1474                 nbytes -= copy;
1475
1476                 dprintk("%s: copy: %u, size: %u, drest: %u, nbytes: %u.\n",
1477                                 __func__, copy, size, drest, nbytes);
1478
1479                 dst++;
1480                 idx++;
1481         }
1482
1483         *nbytesp = nbytes;
1484         *drestp = drest;
1485
1486         return idx;
1487 }
1488
1489 static int hifn_cipher_walk(struct ablkcipher_request *req,
1490                 struct hifn_cipher_walk *w)
1491 {
1492         struct scatterlist *dst, *t;
1493         unsigned int nbytes = req->nbytes, offset, copy, diff;
1494         int idx, tidx, err;
1495
1496         tidx = idx = 0;
1497         offset = 0;
1498         while (nbytes) {
1499                 if (idx >= w->num && (w->flags & ASYNC_FLAGS_MISALIGNED))
1500                         return -EINVAL;
1501
1502                 dst = &req->dst[idx];
1503
1504                 dprintk("\n%s: dlen: %u, doff: %u, offset: %u, nbytes: %u.\n",
1505                         __func__, dst->length, dst->offset, offset, nbytes);
1506
1507                 if (!IS_ALIGNED(dst->offset, HIFN_D_DST_DALIGN) ||
1508                     !IS_ALIGNED(dst->length, HIFN_D_DST_DALIGN) ||
1509                     offset) {
1510                         unsigned slen = min(dst->length - offset, nbytes);
1511                         unsigned dlen = PAGE_SIZE;
1512
1513                         t = &w->cache[idx];
1514
1515                         err = ablkcipher_add(&dlen, dst, slen, &nbytes);
1516                         if (err < 0)
1517                                 return err;
1518
1519                         idx += err;
1520
1521                         copy = slen & ~(HIFN_D_DST_DALIGN - 1);
1522                         diff = slen & (HIFN_D_DST_DALIGN - 1);
1523
1524                         if (dlen < nbytes) {
1525                                 /*
1526                                  * Destination page does not have enough space
1527                                  * to put there additional blocksized chunk,
1528                                  * so we mark that page as containing only
1529                                  * blocksize aligned chunks:
1530                                  *      t->length = (slen & ~(HIFN_D_DST_DALIGN - 1));
1531                                  * and increase number of bytes to be processed
1532                                  * in next chunk:
1533                                  *      nbytes += diff;
1534                                  */
1535                                 nbytes += diff;
1536
1537                                 /*
1538                                  * Temporary of course...
1539                                  * Kick author if you will catch this one.
1540                                  */
1541                                 printk(KERN_ERR "%s: dlen: %u, nbytes: %u,"
1542                                         "slen: %u, offset: %u.\n",
1543                                         __func__, dlen, nbytes, slen, offset);
1544                                 printk(KERN_ERR "%s: please contact author to fix this "
1545                                         "issue, generally you should not catch "
1546                                         "this path under any condition but who "
1547                                         "knows how did you use crypto code.\n"
1548                                         "Thank you.\n", __func__);
1549                                 BUG();
1550                         } else {
1551                                 copy += diff + nbytes;
1552
1553                                 dst = &req->dst[idx];
1554
1555                                 err = ablkcipher_add(&dlen, dst, nbytes, &nbytes);
1556                                 if (err < 0)
1557                                         return err;
1558
1559                                 idx += err;
1560                         }
1561
1562                         t->length = copy;
1563                         t->offset = offset;
1564                 } else {
1565                         nbytes -= min(dst->length, nbytes);
1566                         idx++;
1567                 }
1568
1569                 tidx++;
1570         }
1571
1572         return tidx;
1573 }
1574
1575 static int hifn_setup_session(struct ablkcipher_request *req)
1576 {
1577         struct hifn_context *ctx = crypto_tfm_ctx(req->base.tfm);
1578         struct hifn_request_context *rctx = ablkcipher_request_ctx(req);
1579         struct hifn_device *dev = ctx->dev;
1580         unsigned long dlen, flags;
1581         unsigned int nbytes = req->nbytes, idx = 0;
1582         int err = -EINVAL, sg_num;
1583         struct scatterlist *dst;
1584
1585         if (rctx->iv && !rctx->ivsize && rctx->mode != ACRYPTO_MODE_ECB)
1586                 goto err_out_exit;
1587
1588         rctx->walk.flags = 0;
1589
1590         while (nbytes) {
1591                 dst = &req->dst[idx];
1592                 dlen = min(dst->length, nbytes);
1593
1594                 if (!IS_ALIGNED(dst->offset, HIFN_D_DST_DALIGN) ||
1595                     !IS_ALIGNED(dlen, HIFN_D_DST_DALIGN))
1596                         rctx->walk.flags |= ASYNC_FLAGS_MISALIGNED;
1597
1598                 nbytes -= dlen;
1599                 idx++;
1600         }
1601
1602         if (rctx->walk.flags & ASYNC_FLAGS_MISALIGNED) {
1603                 err = hifn_cipher_walk_init(&rctx->walk, idx, GFP_ATOMIC);
1604                 if (err < 0)
1605                         return err;
1606         }
1607
1608         sg_num = hifn_cipher_walk(req, &rctx->walk);
1609         if (sg_num < 0) {
1610                 err = sg_num;
1611                 goto err_out_exit;
1612         }
1613
1614         spin_lock_irqsave(&dev->lock, flags);
1615         if (dev->started + sg_num > HIFN_QUEUE_LENGTH) {
1616                 err = -EAGAIN;
1617                 goto err_out;
1618         }
1619
1620         err = hifn_setup_dma(dev, ctx, rctx, req->src, req->dst, req->nbytes, req);
1621         if (err)
1622                 goto err_out;
1623
1624         dev->snum++;
1625
1626         dev->active = HIFN_DEFAULT_ACTIVE_NUM;
1627         spin_unlock_irqrestore(&dev->lock, flags);
1628
1629         return 0;
1630
1631 err_out:
1632         spin_unlock_irqrestore(&dev->lock, flags);
1633 err_out_exit:
1634         if (err) {
1635                 printk("%s: iv: %p [%d], key: %p [%d], mode: %u, op: %u, "
1636                                 "type: %u, err: %d.\n",
1637                         dev->name, rctx->iv, rctx->ivsize,
1638                         ctx->key, ctx->keysize,
1639                         rctx->mode, rctx->op, rctx->type, err);
1640         }
1641
1642         return err;
1643 }
1644
1645 static int hifn_test(struct hifn_device *dev, int encdec, u8 snum)
1646 {
1647         int n, err;
1648         u8 src[16];
1649         struct hifn_context ctx;
1650         struct hifn_request_context rctx;
1651         u8 fips_aes_ecb_from_zero[16] = {
1652                 0x66, 0xE9, 0x4B, 0xD4,
1653                 0xEF, 0x8A, 0x2C, 0x3B,
1654                 0x88, 0x4C, 0xFA, 0x59,
1655                 0xCA, 0x34, 0x2B, 0x2E};
1656         struct scatterlist sg;
1657
1658         memset(src, 0, sizeof(src));
1659         memset(ctx.key, 0, sizeof(ctx.key));
1660
1661         ctx.dev = dev;
1662         ctx.keysize = 16;
1663         rctx.ivsize = 0;
1664         rctx.iv = NULL;
1665         rctx.op = (encdec)?ACRYPTO_OP_ENCRYPT:ACRYPTO_OP_DECRYPT;
1666         rctx.mode = ACRYPTO_MODE_ECB;
1667         rctx.type = ACRYPTO_TYPE_AES_128;
1668         rctx.walk.cache[0].length = 0;
1669
1670         sg_init_one(&sg, &src, sizeof(src));
1671
1672         err = hifn_setup_dma(dev, &ctx, &rctx, &sg, &sg, sizeof(src), NULL);
1673         if (err)
1674                 goto err_out;
1675
1676         dev->started = 0;
1677         msleep(200);
1678
1679         dprintk("%s: decoded: ", dev->name);
1680         for (n=0; n<sizeof(src); ++n)
1681                 dprintk("%02x ", src[n]);
1682         dprintk("\n");
1683         dprintk("%s: FIPS   : ", dev->name);
1684         for (n=0; n<sizeof(fips_aes_ecb_from_zero); ++n)
1685                 dprintk("%02x ", fips_aes_ecb_from_zero[n]);
1686         dprintk("\n");
1687
1688         if (!memcmp(src, fips_aes_ecb_from_zero, sizeof(fips_aes_ecb_from_zero))) {
1689                 printk(KERN_INFO "%s: AES 128 ECB test has been successfully "
1690                                 "passed.\n", dev->name);
1691                 return 0;
1692         }
1693
1694 err_out:
1695         printk(KERN_INFO "%s: AES 128 ECB test has been failed.\n", dev->name);
1696         return -1;
1697 }
1698
1699 static int hifn_start_device(struct hifn_device *dev)
1700 {
1701         int err;
1702
1703         dev->started = dev->active = 0;
1704         hifn_reset_dma(dev, 1);
1705
1706         err = hifn_enable_crypto(dev);
1707         if (err)
1708                 return err;
1709
1710         hifn_reset_puc(dev);
1711
1712         hifn_init_dma(dev);
1713
1714         hifn_init_registers(dev);
1715
1716         hifn_init_pubrng(dev);
1717
1718         return 0;
1719 }
1720
1721 static int ablkcipher_get(void *saddr, unsigned int *srestp, unsigned int offset,
1722                 struct scatterlist *dst, unsigned int size, unsigned int *nbytesp)
1723 {
1724         unsigned int srest = *srestp, nbytes = *nbytesp, copy;
1725         void *daddr;
1726         int idx = 0;
1727
1728         if (srest < size || size > nbytes)
1729                 return -EINVAL;
1730
1731         while (size) {
1732                 copy = min3(srest, dst->length, size);
1733
1734                 daddr = kmap_atomic(sg_page(dst));
1735                 memcpy(daddr + dst->offset + offset, saddr, copy);
1736                 kunmap_atomic(daddr);
1737
1738                 nbytes -= copy;
1739                 size -= copy;
1740                 srest -= copy;
1741                 saddr += copy;
1742                 offset = 0;
1743
1744                 dprintk("%s: copy: %u, size: %u, srest: %u, nbytes: %u.\n",
1745                                 __func__, copy, size, srest, nbytes);
1746
1747                 dst++;
1748                 idx++;
1749         }
1750
1751         *nbytesp = nbytes;
1752         *srestp = srest;
1753
1754         return idx;
1755 }
1756
1757 static inline void hifn_complete_sa(struct hifn_device *dev, int i)
1758 {
1759         unsigned long flags;
1760
1761         spin_lock_irqsave(&dev->lock, flags);
1762         dev->sa[i] = NULL;
1763         dev->started--;
1764         if (dev->started < 0)
1765                 printk("%s: started: %d.\n", __func__, dev->started);
1766         spin_unlock_irqrestore(&dev->lock, flags);
1767         BUG_ON(dev->started < 0);
1768 }
1769
1770 static void hifn_process_ready(struct ablkcipher_request *req, int error)
1771 {
1772         struct hifn_request_context *rctx = ablkcipher_request_ctx(req);
1773
1774         if (rctx->walk.flags & ASYNC_FLAGS_MISALIGNED) {
1775                 unsigned int nbytes = req->nbytes;
1776                 int idx = 0, err;
1777                 struct scatterlist *dst, *t;
1778                 void *saddr;
1779
1780                 while (nbytes) {
1781                         t = &rctx->walk.cache[idx];
1782                         dst = &req->dst[idx];
1783
1784                         dprintk("\n%s: sg_page(t): %p, t->length: %u, "
1785                                 "sg_page(dst): %p, dst->length: %u, "
1786                                 "nbytes: %u.\n",
1787                                 __func__, sg_page(t), t->length,
1788                                 sg_page(dst), dst->length, nbytes);
1789
1790                         if (!t->length) {
1791                                 nbytes -= min(dst->length, nbytes);
1792                                 idx++;
1793                                 continue;
1794                         }
1795
1796                         saddr = kmap_atomic(sg_page(t));
1797
1798                         err = ablkcipher_get(saddr, &t->length, t->offset,
1799                                         dst, nbytes, &nbytes);
1800                         if (err < 0) {
1801                                 kunmap_atomic(saddr);
1802                                 break;
1803                         }
1804
1805                         idx += err;
1806                         kunmap_atomic(saddr);
1807                 }
1808
1809                 hifn_cipher_walk_exit(&rctx->walk);
1810         }
1811
1812         req->base.complete(&req->base, error);
1813 }
1814
1815 static void hifn_clear_rings(struct hifn_device *dev, int error)
1816 {
1817         struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
1818         int i, u;
1819
1820         dprintk("%s: ring cleanup 1: i: %d.%d.%d.%d, u: %d.%d.%d.%d, "
1821                         "k: %d.%d.%d.%d.\n",
1822                         dev->name,
1823                         dma->cmdi, dma->srci, dma->dsti, dma->resi,
1824                         dma->cmdu, dma->srcu, dma->dstu, dma->resu,
1825                         dma->cmdk, dma->srck, dma->dstk, dma->resk);
1826
1827         i = dma->resk; u = dma->resu;
1828         while (u != 0) {
1829                 if (dma->resr[i].l & __cpu_to_le32(HIFN_D_VALID))
1830                         break;
1831
1832                 if (dev->sa[i]) {
1833                         dev->success++;
1834                         dev->reset = 0;
1835                         hifn_process_ready(dev->sa[i], error);
1836                         hifn_complete_sa(dev, i);
1837                 }
1838
1839                 if (++i == HIFN_D_RES_RSIZE)
1840                         i = 0;
1841                 u--;
1842         }
1843         dma->resk = i; dma->resu = u;
1844
1845         i = dma->srck; u = dma->srcu;
1846         while (u != 0) {
1847                 if (dma->srcr[i].l & __cpu_to_le32(HIFN_D_VALID))
1848                         break;
1849                 if (++i == HIFN_D_SRC_RSIZE)
1850                         i = 0;
1851                 u--;
1852         }
1853         dma->srck = i; dma->srcu = u;
1854
1855         i = dma->cmdk; u = dma->cmdu;
1856         while (u != 0) {
1857                 if (dma->cmdr[i].l & __cpu_to_le32(HIFN_D_VALID))
1858                         break;
1859                 if (++i == HIFN_D_CMD_RSIZE)
1860                         i = 0;
1861                 u--;
1862         }
1863         dma->cmdk = i; dma->cmdu = u;
1864
1865         i = dma->dstk; u = dma->dstu;
1866         while (u != 0) {
1867                 if (dma->dstr[i].l & __cpu_to_le32(HIFN_D_VALID))
1868                         break;
1869                 if (++i == HIFN_D_DST_RSIZE)
1870                         i = 0;
1871                 u--;
1872         }
1873         dma->dstk = i; dma->dstu = u;
1874
1875         dprintk("%s: ring cleanup 2: i: %d.%d.%d.%d, u: %d.%d.%d.%d, "
1876                         "k: %d.%d.%d.%d.\n",
1877                         dev->name,
1878                         dma->cmdi, dma->srci, dma->dsti, dma->resi,
1879                         dma->cmdu, dma->srcu, dma->dstu, dma->resu,
1880                         dma->cmdk, dma->srck, dma->dstk, dma->resk);
1881 }
1882
1883 static void hifn_work(struct work_struct *work)
1884 {
1885         struct delayed_work *dw = to_delayed_work(work);
1886         struct hifn_device *dev = container_of(dw, struct hifn_device, work);
1887         unsigned long flags;
1888         int reset = 0;
1889         u32 r = 0;
1890
1891         spin_lock_irqsave(&dev->lock, flags);
1892         if (dev->active == 0) {
1893                 struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
1894
1895                 if (dma->cmdu == 0 && (dev->flags & HIFN_FLAG_CMD_BUSY)) {
1896                         dev->flags &= ~HIFN_FLAG_CMD_BUSY;
1897                         r |= HIFN_DMACSR_C_CTRL_DIS;
1898                 }
1899                 if (dma->srcu == 0 && (dev->flags & HIFN_FLAG_SRC_BUSY)) {
1900                         dev->flags &= ~HIFN_FLAG_SRC_BUSY;
1901                         r |= HIFN_DMACSR_S_CTRL_DIS;
1902                 }
1903                 if (dma->dstu == 0 && (dev->flags & HIFN_FLAG_DST_BUSY)) {
1904                         dev->flags &= ~HIFN_FLAG_DST_BUSY;
1905                         r |= HIFN_DMACSR_D_CTRL_DIS;
1906                 }
1907                 if (dma->resu == 0 && (dev->flags & HIFN_FLAG_RES_BUSY)) {
1908                         dev->flags &= ~HIFN_FLAG_RES_BUSY;
1909                         r |= HIFN_DMACSR_R_CTRL_DIS;
1910                 }
1911                 if (r)
1912                         hifn_write_1(dev, HIFN_1_DMA_CSR, r);
1913         } else
1914                 dev->active--;
1915
1916         if ((dev->prev_success == dev->success) && dev->started)
1917                 reset = 1;
1918         dev->prev_success = dev->success;
1919         spin_unlock_irqrestore(&dev->lock, flags);
1920
1921         if (reset) {
1922                 if (++dev->reset >= 5) {
1923                         int i;
1924                         struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
1925
1926                         printk("%s: r: %08x, active: %d, started: %d, "
1927                                 "success: %lu: qlen: %u/%u, reset: %d.\n",
1928                                 dev->name, r, dev->active, dev->started,
1929                                 dev->success, dev->queue.qlen, dev->queue.max_qlen,
1930                                 reset);
1931
1932                         printk("%s: res: ", __func__);
1933                         for (i=0; i<HIFN_D_RES_RSIZE; ++i) {
1934                                 printk("%x.%p ", dma->resr[i].l, dev->sa[i]);
1935                                 if (dev->sa[i]) {
1936                                         hifn_process_ready(dev->sa[i], -ENODEV);
1937                                         hifn_complete_sa(dev, i);
1938                                 }
1939                         }
1940                         printk("\n");
1941
1942                         hifn_reset_dma(dev, 1);
1943                         hifn_stop_device(dev);
1944                         hifn_start_device(dev);
1945                         dev->reset = 0;
1946                 }
1947
1948                 tasklet_schedule(&dev->tasklet);
1949         }
1950
1951         schedule_delayed_work(&dev->work, HZ);
1952 }
1953
1954 static irqreturn_t hifn_interrupt(int irq, void *data)
1955 {
1956         struct hifn_device *dev = (struct hifn_device *)data;
1957         struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
1958         u32 dmacsr, restart;
1959
1960         dmacsr = hifn_read_1(dev, HIFN_1_DMA_CSR);
1961
1962         dprintk("%s: 1 dmacsr: %08x, dmareg: %08x, res: %08x [%d], "
1963                         "i: %d.%d.%d.%d, u: %d.%d.%d.%d.\n",
1964                 dev->name, dmacsr, dev->dmareg, dmacsr & dev->dmareg, dma->cmdi,
1965                 dma->cmdi, dma->srci, dma->dsti, dma->resi,
1966                 dma->cmdu, dma->srcu, dma->dstu, dma->resu);
1967
1968         if ((dmacsr & dev->dmareg) == 0)
1969                 return IRQ_NONE;
1970
1971         hifn_write_1(dev, HIFN_1_DMA_CSR, dmacsr & dev->dmareg);
1972
1973         if (dmacsr & HIFN_DMACSR_ENGINE)
1974                 hifn_write_0(dev, HIFN_0_PUISR, hifn_read_0(dev, HIFN_0_PUISR));
1975         if (dmacsr & HIFN_DMACSR_PUBDONE)
1976                 hifn_write_1(dev, HIFN_1_PUB_STATUS,
1977                         hifn_read_1(dev, HIFN_1_PUB_STATUS) | HIFN_PUBSTS_DONE);
1978
1979         restart = dmacsr & (HIFN_DMACSR_R_OVER | HIFN_DMACSR_D_OVER);
1980         if (restart) {
1981                 u32 puisr = hifn_read_0(dev, HIFN_0_PUISR);
1982
1983                 printk(KERN_WARNING "%s: overflow: r: %d, d: %d, puisr: %08x, d: %u.\n",
1984                         dev->name, !!(dmacsr & HIFN_DMACSR_R_OVER),
1985                         !!(dmacsr & HIFN_DMACSR_D_OVER),
1986                         puisr, !!(puisr & HIFN_PUISR_DSTOVER));
1987                 if (!!(puisr & HIFN_PUISR_DSTOVER))
1988                         hifn_write_0(dev, HIFN_0_PUISR, HIFN_PUISR_DSTOVER);
1989                 hifn_write_1(dev, HIFN_1_DMA_CSR, dmacsr & (HIFN_DMACSR_R_OVER |
1990                                         HIFN_DMACSR_D_OVER));
1991         }
1992
1993         restart = dmacsr & (HIFN_DMACSR_C_ABORT | HIFN_DMACSR_S_ABORT |
1994                         HIFN_DMACSR_D_ABORT | HIFN_DMACSR_R_ABORT);
1995         if (restart) {
1996                 printk(KERN_WARNING "%s: abort: c: %d, s: %d, d: %d, r: %d.\n",
1997                         dev->name, !!(dmacsr & HIFN_DMACSR_C_ABORT),
1998                         !!(dmacsr & HIFN_DMACSR_S_ABORT),
1999                         !!(dmacsr & HIFN_DMACSR_D_ABORT),
2000                         !!(dmacsr & HIFN_DMACSR_R_ABORT));
2001                 hifn_reset_dma(dev, 1);
2002                 hifn_init_dma(dev);
2003                 hifn_init_registers(dev);
2004         }
2005
2006         if ((dmacsr & HIFN_DMACSR_C_WAIT) && (dma->cmdu == 0)) {
2007                 dprintk("%s: wait on command.\n", dev->name);
2008                 dev->dmareg &= ~(HIFN_DMAIER_C_WAIT);
2009                 hifn_write_1(dev, HIFN_1_DMA_IER, dev->dmareg);
2010         }
2011
2012         tasklet_schedule(&dev->tasklet);
2013
2014         return IRQ_HANDLED;
2015 }
2016
2017 static void hifn_flush(struct hifn_device *dev)
2018 {
2019         unsigned long flags;
2020         struct crypto_async_request *async_req;
2021         struct ablkcipher_request *req;
2022         struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
2023         int i;
2024
2025         for (i=0; i<HIFN_D_RES_RSIZE; ++i) {
2026                 struct hifn_desc *d = &dma->resr[i];
2027
2028                 if (dev->sa[i]) {
2029                         hifn_process_ready(dev->sa[i],
2030                                 (d->l & __cpu_to_le32(HIFN_D_VALID))?-ENODEV:0);
2031                         hifn_complete_sa(dev, i);
2032                 }
2033         }
2034
2035         spin_lock_irqsave(&dev->lock, flags);
2036         while ((async_req = crypto_dequeue_request(&dev->queue))) {
2037                 req = container_of(async_req, struct ablkcipher_request, base);
2038                 spin_unlock_irqrestore(&dev->lock, flags);
2039
2040                 hifn_process_ready(req, -ENODEV);
2041
2042                 spin_lock_irqsave(&dev->lock, flags);
2043         }
2044         spin_unlock_irqrestore(&dev->lock, flags);
2045 }
2046
2047 static int hifn_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
2048                 unsigned int len)
2049 {
2050         struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
2051         struct hifn_context *ctx = crypto_tfm_ctx(tfm);
2052         struct hifn_device *dev = ctx->dev;
2053
2054         if (len > HIFN_MAX_CRYPT_KEY_LENGTH) {
2055                 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
2056                 return -1;
2057         }
2058
2059         if (len == HIFN_DES_KEY_LENGTH) {
2060                 u32 tmp[DES_EXPKEY_WORDS];
2061                 int ret = des_ekey(tmp, key);
2062
2063                 if (unlikely(ret == 0) && (tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
2064                         tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
2065                         return -EINVAL;
2066                 }
2067         }
2068
2069         dev->flags &= ~HIFN_FLAG_OLD_KEY;
2070
2071         memcpy(ctx->key, key, len);
2072         ctx->keysize = len;
2073
2074         return 0;
2075 }
2076
2077 static int hifn_handle_req(struct ablkcipher_request *req)
2078 {
2079         struct hifn_context *ctx = crypto_tfm_ctx(req->base.tfm);
2080         struct hifn_device *dev = ctx->dev;
2081         int err = -EAGAIN;
2082
2083         if (dev->started + DIV_ROUND_UP(req->nbytes, PAGE_SIZE) <= HIFN_QUEUE_LENGTH)
2084                 err = hifn_setup_session(req);
2085
2086         if (err == -EAGAIN) {
2087                 unsigned long flags;
2088
2089                 spin_lock_irqsave(&dev->lock, flags);
2090                 err = ablkcipher_enqueue_request(&dev->queue, req);
2091                 spin_unlock_irqrestore(&dev->lock, flags);
2092         }
2093
2094         return err;
2095 }
2096
2097 static int hifn_setup_crypto_req(struct ablkcipher_request *req, u8 op,
2098                 u8 type, u8 mode)
2099 {
2100         struct hifn_context *ctx = crypto_tfm_ctx(req->base.tfm);
2101         struct hifn_request_context *rctx = ablkcipher_request_ctx(req);
2102         unsigned ivsize;
2103
2104         ivsize = crypto_ablkcipher_ivsize(crypto_ablkcipher_reqtfm(req));
2105
2106         if (req->info && mode != ACRYPTO_MODE_ECB) {
2107                 if (type == ACRYPTO_TYPE_AES_128)
2108                         ivsize = HIFN_AES_IV_LENGTH;
2109                 else if (type == ACRYPTO_TYPE_DES)
2110                         ivsize = HIFN_DES_KEY_LENGTH;
2111                 else if (type == ACRYPTO_TYPE_3DES)
2112                         ivsize = HIFN_3DES_KEY_LENGTH;
2113         }
2114
2115         if (ctx->keysize != 16 && type == ACRYPTO_TYPE_AES_128) {
2116                 if (ctx->keysize == 24)
2117                         type = ACRYPTO_TYPE_AES_192;
2118                 else if (ctx->keysize == 32)
2119                         type = ACRYPTO_TYPE_AES_256;
2120         }
2121
2122         rctx->op = op;
2123         rctx->mode = mode;
2124         rctx->type = type;
2125         rctx->iv = req->info;
2126         rctx->ivsize = ivsize;
2127
2128         /*
2129          * HEAVY TODO: needs to kick Herbert XU to write documentation.
2130          * HEAVY TODO: needs to kick Herbert XU to write documentation.
2131          * HEAVY TODO: needs to kick Herbert XU to write documentation.
2132          */
2133
2134         return hifn_handle_req(req);
2135 }
2136
2137 static int hifn_process_queue(struct hifn_device *dev)
2138 {
2139         struct crypto_async_request *async_req, *backlog;
2140         struct ablkcipher_request *req;
2141         unsigned long flags;
2142         int err = 0;
2143
2144         while (dev->started < HIFN_QUEUE_LENGTH) {
2145                 spin_lock_irqsave(&dev->lock, flags);
2146                 backlog = crypto_get_backlog(&dev->queue);
2147                 async_req = crypto_dequeue_request(&dev->queue);
2148                 spin_unlock_irqrestore(&dev->lock, flags);
2149
2150                 if (!async_req)
2151                         break;
2152
2153                 if (backlog)
2154                         backlog->complete(backlog, -EINPROGRESS);
2155
2156                 req = container_of(async_req, struct ablkcipher_request, base);
2157
2158                 err = hifn_handle_req(req);
2159                 if (err)
2160                         break;
2161         }
2162
2163         return err;
2164 }
2165
2166 static int hifn_setup_crypto(struct ablkcipher_request *req, u8 op,
2167                 u8 type, u8 mode)
2168 {
2169         int err;
2170         struct hifn_context *ctx = crypto_tfm_ctx(req->base.tfm);
2171         struct hifn_device *dev = ctx->dev;
2172
2173         err = hifn_setup_crypto_req(req, op, type, mode);
2174         if (err)
2175                 return err;
2176
2177         if (dev->started < HIFN_QUEUE_LENGTH && dev->queue.qlen)
2178                 hifn_process_queue(dev);
2179
2180         return -EINPROGRESS;
2181 }
2182
2183 /*
2184  * AES ecryption functions.
2185  */
2186 static inline int hifn_encrypt_aes_ecb(struct ablkcipher_request *req)
2187 {
2188         return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
2189                         ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_ECB);
2190 }
2191 static inline int hifn_encrypt_aes_cbc(struct ablkcipher_request *req)
2192 {
2193         return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
2194                         ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_CBC);
2195 }
2196 static inline int hifn_encrypt_aes_cfb(struct ablkcipher_request *req)
2197 {
2198         return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
2199                         ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_CFB);
2200 }
2201 static inline int hifn_encrypt_aes_ofb(struct ablkcipher_request *req)
2202 {
2203         return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
2204                         ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_OFB);
2205 }
2206
2207 /*
2208  * AES decryption functions.
2209  */
2210 static inline int hifn_decrypt_aes_ecb(struct ablkcipher_request *req)
2211 {
2212         return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
2213                         ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_ECB);
2214 }
2215 static inline int hifn_decrypt_aes_cbc(struct ablkcipher_request *req)
2216 {
2217         return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
2218                         ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_CBC);
2219 }
2220 static inline int hifn_decrypt_aes_cfb(struct ablkcipher_request *req)
2221 {
2222         return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
2223                         ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_CFB);
2224 }
2225 static inline int hifn_decrypt_aes_ofb(struct ablkcipher_request *req)
2226 {
2227         return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
2228                         ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_OFB);
2229 }
2230
2231 /*
2232  * DES ecryption functions.
2233  */
2234 static inline int hifn_encrypt_des_ecb(struct ablkcipher_request *req)
2235 {
2236         return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
2237                         ACRYPTO_TYPE_DES, ACRYPTO_MODE_ECB);
2238 }
2239 static inline int hifn_encrypt_des_cbc(struct ablkcipher_request *req)
2240 {
2241         return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
2242                         ACRYPTO_TYPE_DES, ACRYPTO_MODE_CBC);
2243 }
2244 static inline int hifn_encrypt_des_cfb(struct ablkcipher_request *req)
2245 {
2246         return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
2247                         ACRYPTO_TYPE_DES, ACRYPTO_MODE_CFB);
2248 }
2249 static inline int hifn_encrypt_des_ofb(struct ablkcipher_request *req)
2250 {
2251         return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
2252                         ACRYPTO_TYPE_DES, ACRYPTO_MODE_OFB);
2253 }
2254
2255 /*
2256  * DES decryption functions.
2257  */
2258 static inline int hifn_decrypt_des_ecb(struct ablkcipher_request *req)
2259 {
2260         return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
2261                         ACRYPTO_TYPE_DES, ACRYPTO_MODE_ECB);
2262 }
2263 static inline int hifn_decrypt_des_cbc(struct ablkcipher_request *req)
2264 {
2265         return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
2266                         ACRYPTO_TYPE_DES, ACRYPTO_MODE_CBC);
2267 }
2268 static inline int hifn_decrypt_des_cfb(struct ablkcipher_request *req)
2269 {
2270         return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
2271                         ACRYPTO_TYPE_DES, ACRYPTO_MODE_CFB);
2272 }
2273 static inline int hifn_decrypt_des_ofb(struct ablkcipher_request *req)
2274 {
2275         return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
2276                         ACRYPTO_TYPE_DES, ACRYPTO_MODE_OFB);
2277 }
2278
2279 /*
2280  * 3DES ecryption functions.
2281  */
2282 static inline int hifn_encrypt_3des_ecb(struct ablkcipher_request *req)
2283 {
2284         return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
2285                         ACRYPTO_TYPE_3DES, ACRYPTO_MODE_ECB);
2286 }
2287 static inline int hifn_encrypt_3des_cbc(struct ablkcipher_request *req)
2288 {
2289         return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
2290                         ACRYPTO_TYPE_3DES, ACRYPTO_MODE_CBC);
2291 }
2292 static inline int hifn_encrypt_3des_cfb(struct ablkcipher_request *req)
2293 {
2294         return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
2295                         ACRYPTO_TYPE_3DES, ACRYPTO_MODE_CFB);
2296 }
2297 static inline int hifn_encrypt_3des_ofb(struct ablkcipher_request *req)
2298 {
2299         return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
2300                         ACRYPTO_TYPE_3DES, ACRYPTO_MODE_OFB);
2301 }
2302
2303 /*
2304  * 3DES decryption functions.
2305  */
2306 static inline int hifn_decrypt_3des_ecb(struct ablkcipher_request *req)
2307 {
2308         return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
2309                         ACRYPTO_TYPE_3DES, ACRYPTO_MODE_ECB);
2310 }
2311 static inline int hifn_decrypt_3des_cbc(struct ablkcipher_request *req)
2312 {
2313         return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
2314                         ACRYPTO_TYPE_3DES, ACRYPTO_MODE_CBC);
2315 }
2316 static inline int hifn_decrypt_3des_cfb(struct ablkcipher_request *req)
2317 {
2318         return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
2319                         ACRYPTO_TYPE_3DES, ACRYPTO_MODE_CFB);
2320 }
2321 static inline int hifn_decrypt_3des_ofb(struct ablkcipher_request *req)
2322 {
2323         return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
2324                         ACRYPTO_TYPE_3DES, ACRYPTO_MODE_OFB);
2325 }
2326
2327 struct hifn_alg_template
2328 {
2329         char name[CRYPTO_MAX_ALG_NAME];
2330         char drv_name[CRYPTO_MAX_ALG_NAME];
2331         unsigned int bsize;
2332         struct ablkcipher_alg ablkcipher;
2333 };
2334
2335 static struct hifn_alg_template hifn_alg_templates[] = {
2336         /*
2337          * 3DES ECB, CBC, CFB and OFB modes.
2338          */
2339         {
2340                 .name = "cfb(des3_ede)", .drv_name = "cfb-3des", .bsize = 8,
2341                 .ablkcipher = {
2342                         .min_keysize    =       HIFN_3DES_KEY_LENGTH,
2343                         .max_keysize    =       HIFN_3DES_KEY_LENGTH,
2344                         .setkey         =       hifn_setkey,
2345                         .encrypt        =       hifn_encrypt_3des_cfb,
2346                         .decrypt        =       hifn_decrypt_3des_cfb,
2347                 },
2348         },
2349         {
2350                 .name = "ofb(des3_ede)", .drv_name = "ofb-3des", .bsize = 8,
2351                 .ablkcipher = {
2352                         .min_keysize    =       HIFN_3DES_KEY_LENGTH,
2353                         .max_keysize    =       HIFN_3DES_KEY_LENGTH,
2354                         .setkey         =       hifn_setkey,
2355                         .encrypt        =       hifn_encrypt_3des_ofb,
2356                         .decrypt        =       hifn_decrypt_3des_ofb,
2357                 },
2358         },
2359         {
2360                 .name = "cbc(des3_ede)", .drv_name = "cbc-3des", .bsize = 8,
2361                 .ablkcipher = {
2362                         .ivsize         =       HIFN_IV_LENGTH,
2363                         .min_keysize    =       HIFN_3DES_KEY_LENGTH,
2364                         .max_keysize    =       HIFN_3DES_KEY_LENGTH,
2365                         .setkey         =       hifn_setkey,
2366                         .encrypt        =       hifn_encrypt_3des_cbc,
2367                         .decrypt        =       hifn_decrypt_3des_cbc,
2368                 },
2369         },
2370         {
2371                 .name = "ecb(des3_ede)", .drv_name = "ecb-3des", .bsize = 8,
2372                 .ablkcipher = {
2373                         .min_keysize    =       HIFN_3DES_KEY_LENGTH,
2374                         .max_keysize    =       HIFN_3DES_KEY_LENGTH,
2375                         .setkey         =       hifn_setkey,
2376                         .encrypt        =       hifn_encrypt_3des_ecb,
2377                         .decrypt        =       hifn_decrypt_3des_ecb,
2378                 },
2379         },
2380
2381         /*
2382          * DES ECB, CBC, CFB and OFB modes.
2383          */
2384         {
2385                 .name = "cfb(des)", .drv_name = "cfb-des", .bsize = 8,
2386                 .ablkcipher = {
2387                         .min_keysize    =       HIFN_DES_KEY_LENGTH,
2388                         .max_keysize    =       HIFN_DES_KEY_LENGTH,
2389                         .setkey         =       hifn_setkey,
2390                         .encrypt        =       hifn_encrypt_des_cfb,
2391                         .decrypt        =       hifn_decrypt_des_cfb,
2392                 },
2393         },
2394         {
2395                 .name = "ofb(des)", .drv_name = "ofb-des", .bsize = 8,
2396                 .ablkcipher = {
2397                         .min_keysize    =       HIFN_DES_KEY_LENGTH,
2398                         .max_keysize    =       HIFN_DES_KEY_LENGTH,
2399                         .setkey         =       hifn_setkey,
2400                         .encrypt        =       hifn_encrypt_des_ofb,
2401                         .decrypt        =       hifn_decrypt_des_ofb,
2402                 },
2403         },
2404         {
2405                 .name = "cbc(des)", .drv_name = "cbc-des", .bsize = 8,
2406                 .ablkcipher = {
2407                         .ivsize         =       HIFN_IV_LENGTH,
2408                         .min_keysize    =       HIFN_DES_KEY_LENGTH,
2409                         .max_keysize    =       HIFN_DES_KEY_LENGTH,
2410                         .setkey         =       hifn_setkey,
2411                         .encrypt        =       hifn_encrypt_des_cbc,
2412                         .decrypt        =       hifn_decrypt_des_cbc,
2413                 },
2414         },
2415         {
2416                 .name = "ecb(des)", .drv_name = "ecb-des", .bsize = 8,
2417                 .ablkcipher = {
2418                         .min_keysize    =       HIFN_DES_KEY_LENGTH,
2419                         .max_keysize    =       HIFN_DES_KEY_LENGTH,
2420                         .setkey         =       hifn_setkey,
2421                         .encrypt        =       hifn_encrypt_des_ecb,
2422                         .decrypt        =       hifn_decrypt_des_ecb,
2423                 },
2424         },
2425
2426         /*
2427          * AES ECB, CBC, CFB and OFB modes.
2428          */
2429         {
2430                 .name = "ecb(aes)", .drv_name = "ecb-aes", .bsize = 16,
2431                 .ablkcipher = {
2432                         .min_keysize    =       AES_MIN_KEY_SIZE,
2433                         .max_keysize    =       AES_MAX_KEY_SIZE,
2434                         .setkey         =       hifn_setkey,
2435                         .encrypt        =       hifn_encrypt_aes_ecb,
2436                         .decrypt        =       hifn_decrypt_aes_ecb,
2437                 },
2438         },
2439         {
2440                 .name = "cbc(aes)", .drv_name = "cbc-aes", .bsize = 16,
2441                 .ablkcipher = {
2442                         .ivsize         =       HIFN_AES_IV_LENGTH,
2443                         .min_keysize    =       AES_MIN_KEY_SIZE,
2444                         .max_keysize    =       AES_MAX_KEY_SIZE,
2445                         .setkey         =       hifn_setkey,
2446                         .encrypt        =       hifn_encrypt_aes_cbc,
2447                         .decrypt        =       hifn_decrypt_aes_cbc,
2448                 },
2449         },
2450         {
2451                 .name = "cfb(aes)", .drv_name = "cfb-aes", .bsize = 16,
2452                 .ablkcipher = {
2453                         .min_keysize    =       AES_MIN_KEY_SIZE,
2454                         .max_keysize    =       AES_MAX_KEY_SIZE,
2455                         .setkey         =       hifn_setkey,
2456                         .encrypt        =       hifn_encrypt_aes_cfb,
2457                         .decrypt        =       hifn_decrypt_aes_cfb,
2458                 },
2459         },
2460         {
2461                 .name = "ofb(aes)", .drv_name = "ofb-aes", .bsize = 16,
2462                 .ablkcipher = {
2463                         .min_keysize    =       AES_MIN_KEY_SIZE,
2464                         .max_keysize    =       AES_MAX_KEY_SIZE,
2465                         .setkey         =       hifn_setkey,
2466                         .encrypt        =       hifn_encrypt_aes_ofb,
2467                         .decrypt        =       hifn_decrypt_aes_ofb,
2468                 },
2469         },
2470 };
2471
2472 static int hifn_cra_init(struct crypto_tfm *tfm)
2473 {
2474         struct crypto_alg *alg = tfm->__crt_alg;
2475         struct hifn_crypto_alg *ha = crypto_alg_to_hifn(alg);
2476         struct hifn_context *ctx = crypto_tfm_ctx(tfm);
2477
2478         ctx->dev = ha->dev;
2479         tfm->crt_ablkcipher.reqsize = sizeof(struct hifn_request_context);
2480         return 0;
2481 }
2482
2483 static int hifn_alg_alloc(struct hifn_device *dev, struct hifn_alg_template *t)
2484 {
2485         struct hifn_crypto_alg *alg;
2486         int err;
2487
2488         alg = kzalloc(sizeof(struct hifn_crypto_alg), GFP_KERNEL);
2489         if (!alg)
2490                 return -ENOMEM;
2491
2492         snprintf(alg->alg.cra_name, CRYPTO_MAX_ALG_NAME, "%s", t->name);
2493         snprintf(alg->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s-%s",
2494                  t->drv_name, dev->name);
2495
2496         alg->alg.cra_priority = 300;
2497         alg->alg.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
2498                                 CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC;
2499         alg->alg.cra_blocksize = t->bsize;
2500         alg->alg.cra_ctxsize = sizeof(struct hifn_context);
2501         alg->alg.cra_alignmask = 0;
2502         alg->alg.cra_type = &crypto_ablkcipher_type;
2503         alg->alg.cra_module = THIS_MODULE;
2504         alg->alg.cra_u.ablkcipher = t->ablkcipher;
2505         alg->alg.cra_init = hifn_cra_init;
2506
2507         alg->dev = dev;
2508
2509         list_add_tail(&alg->entry, &dev->alg_list);
2510
2511         err = crypto_register_alg(&alg->alg);
2512         if (err) {
2513                 list_del(&alg->entry);
2514                 kfree(alg);
2515         }
2516
2517         return err;
2518 }
2519
2520 static void hifn_unregister_alg(struct hifn_device *dev)
2521 {
2522         struct hifn_crypto_alg *a, *n;
2523
2524         list_for_each_entry_safe(a, n, &dev->alg_list, entry) {
2525                 list_del(&a->entry);
2526                 crypto_unregister_alg(&a->alg);
2527                 kfree(a);
2528         }
2529 }
2530
2531 static int hifn_register_alg(struct hifn_device *dev)
2532 {
2533         int i, err;
2534
2535         for (i=0; i<ARRAY_SIZE(hifn_alg_templates); ++i) {
2536                 err = hifn_alg_alloc(dev, &hifn_alg_templates[i]);
2537                 if (err)
2538                         goto err_out_exit;
2539         }
2540
2541         return 0;
2542
2543 err_out_exit:
2544         hifn_unregister_alg(dev);
2545         return err;
2546 }
2547
2548 static void hifn_tasklet_callback(unsigned long data)
2549 {
2550         struct hifn_device *dev = (struct hifn_device *)data;
2551
2552         /*
2553          * This is ok to call this without lock being held,
2554          * althogh it modifies some parameters used in parallel,
2555          * (like dev->success), but they are used in process
2556          * context or update is atomic (like setting dev->sa[i] to NULL).
2557          */
2558         hifn_clear_rings(dev, 0);
2559
2560         if (dev->started < HIFN_QUEUE_LENGTH && dev->queue.qlen)
2561                 hifn_process_queue(dev);
2562 }
2563
2564 static int hifn_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2565 {
2566         int err, i;
2567         struct hifn_device *dev;
2568         char name[8];
2569
2570         err = pci_enable_device(pdev);
2571         if (err)
2572                 return err;
2573         pci_set_master(pdev);
2574
2575         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2576         if (err)
2577                 goto err_out_disable_pci_device;
2578
2579         snprintf(name, sizeof(name), "hifn%d",
2580                         atomic_inc_return(&hifn_dev_number)-1);
2581
2582         err = pci_request_regions(pdev, name);
2583         if (err)
2584                 goto err_out_disable_pci_device;
2585
2586         if (pci_resource_len(pdev, 0) < HIFN_BAR0_SIZE ||
2587             pci_resource_len(pdev, 1) < HIFN_BAR1_SIZE ||
2588             pci_resource_len(pdev, 2) < HIFN_BAR2_SIZE) {
2589                 dprintk("%s: Broken hardware - I/O regions are too small.\n",
2590                                 pci_name(pdev));
2591                 err = -ENODEV;
2592                 goto err_out_free_regions;
2593         }
2594
2595         dev = kzalloc(sizeof(struct hifn_device) + sizeof(struct crypto_alg),
2596                         GFP_KERNEL);
2597         if (!dev) {
2598                 err = -ENOMEM;
2599                 goto err_out_free_regions;
2600         }
2601
2602         INIT_LIST_HEAD(&dev->alg_list);
2603
2604         snprintf(dev->name, sizeof(dev->name), "%s", name);
2605         spin_lock_init(&dev->lock);
2606
2607         for (i=0; i<3; ++i) {
2608                 unsigned long addr, size;
2609
2610                 addr = pci_resource_start(pdev, i);
2611                 size = pci_resource_len(pdev, i);
2612
2613                 dev->bar[i] = ioremap_nocache(addr, size);
2614                 if (!dev->bar[i]) {
2615                         err = -ENOMEM;
2616                         goto err_out_unmap_bars;
2617                 }
2618         }
2619
2620         dev->desc_virt = pci_alloc_consistent(pdev, sizeof(struct hifn_dma),
2621                         &dev->desc_dma);
2622         if (!dev->desc_virt) {
2623                 dprintk("Failed to allocate descriptor rings.\n");
2624                 err = -ENOMEM;
2625                 goto err_out_unmap_bars;
2626         }
2627         memset(dev->desc_virt, 0, sizeof(struct hifn_dma));
2628
2629         dev->pdev = pdev;
2630         dev->irq = pdev->irq;
2631
2632         for (i=0; i<HIFN_D_RES_RSIZE; ++i)
2633                 dev->sa[i] = NULL;
2634
2635         pci_set_drvdata(pdev, dev);
2636
2637         tasklet_init(&dev->tasklet, hifn_tasklet_callback, (unsigned long)dev);
2638
2639         crypto_init_queue(&dev->queue, 1);
2640
2641         err = request_irq(dev->irq, hifn_interrupt, IRQF_SHARED, dev->name, dev);
2642         if (err) {
2643                 dprintk("Failed to request IRQ%d: err: %d.\n", dev->irq, err);
2644                 dev->irq = 0;
2645                 goto err_out_free_desc;
2646         }
2647
2648         err = hifn_start_device(dev);
2649         if (err)
2650                 goto err_out_free_irq;
2651
2652         err = hifn_test(dev, 1, 0);
2653         if (err)
2654                 goto err_out_stop_device;
2655
2656         err = hifn_register_rng(dev);
2657         if (err)
2658                 goto err_out_stop_device;
2659
2660         err = hifn_register_alg(dev);
2661         if (err)
2662                 goto err_out_unregister_rng;
2663
2664         INIT_DELAYED_WORK(&dev->work, hifn_work);
2665         schedule_delayed_work(&dev->work, HZ);
2666
2667         dprintk("HIFN crypto accelerator card at %s has been "
2668                         "successfully registered as %s.\n",
2669                         pci_name(pdev), dev->name);
2670
2671         return 0;
2672
2673 err_out_unregister_rng:
2674         hifn_unregister_rng(dev);
2675 err_out_stop_device:
2676         hifn_reset_dma(dev, 1);
2677         hifn_stop_device(dev);
2678 err_out_free_irq:
2679         free_irq(dev->irq, dev);
2680         tasklet_kill(&dev->tasklet);
2681 err_out_free_desc:
2682         pci_free_consistent(pdev, sizeof(struct hifn_dma),
2683                         dev->desc_virt, dev->desc_dma);
2684
2685 err_out_unmap_bars:
2686         for (i=0; i<3; ++i)
2687                 if (dev->bar[i])
2688                         iounmap(dev->bar[i]);
2689
2690 err_out_free_regions:
2691         pci_release_regions(pdev);
2692
2693 err_out_disable_pci_device:
2694         pci_disable_device(pdev);
2695
2696         return err;
2697 }
2698
2699 static void hifn_remove(struct pci_dev *pdev)
2700 {
2701         int i;
2702         struct hifn_device *dev;
2703
2704         dev = pci_get_drvdata(pdev);
2705
2706         if (dev) {
2707                 cancel_delayed_work_sync(&dev->work);
2708
2709                 hifn_unregister_rng(dev);
2710                 hifn_unregister_alg(dev);
2711                 hifn_reset_dma(dev, 1);
2712                 hifn_stop_device(dev);
2713
2714                 free_irq(dev->irq, dev);
2715                 tasklet_kill(&dev->tasklet);
2716
2717                 hifn_flush(dev);
2718
2719                 pci_free_consistent(pdev, sizeof(struct hifn_dma),
2720                                 dev->desc_virt, dev->desc_dma);
2721                 for (i=0; i<3; ++i)
2722                         if (dev->bar[i])
2723                                 iounmap(dev->bar[i]);
2724
2725                 kfree(dev);
2726         }
2727
2728         pci_release_regions(pdev);
2729         pci_disable_device(pdev);
2730 }
2731
2732 static struct pci_device_id hifn_pci_tbl[] = {
2733         { PCI_DEVICE(PCI_VENDOR_ID_HIFN, PCI_DEVICE_ID_HIFN_7955) },
2734         { PCI_DEVICE(PCI_VENDOR_ID_HIFN, PCI_DEVICE_ID_HIFN_7956) },
2735         { 0 }
2736 };
2737 MODULE_DEVICE_TABLE(pci, hifn_pci_tbl);
2738
2739 static struct pci_driver hifn_pci_driver = {
2740         .name     = "hifn795x",
2741         .id_table = hifn_pci_tbl,
2742         .probe    = hifn_probe,
2743         .remove   = hifn_remove,
2744 };
2745
2746 static int __init hifn_init(void)
2747 {
2748         unsigned int freq;
2749         int err;
2750
2751         /* HIFN supports only 32-bit addresses */
2752         BUILD_BUG_ON(sizeof(dma_addr_t) != 4);
2753
2754         if (strncmp(hifn_pll_ref, "ext", 3) &&
2755             strncmp(hifn_pll_ref, "pci", 3)) {
2756                 printk(KERN_ERR "hifn795x: invalid hifn_pll_ref clock, "
2757                                 "must be pci or ext");
2758                 return -EINVAL;
2759         }
2760
2761         /*
2762          * For the 7955/7956 the reference clock frequency must be in the
2763          * range of 20MHz-100MHz. For the 7954 the upper bound is 66.67MHz,
2764          * but this chip is currently not supported.
2765          */
2766         if (hifn_pll_ref[3] != '\0') {
2767                 freq = simple_strtoul(hifn_pll_ref + 3, NULL, 10);
2768                 if (freq < 20 || freq > 100) {
2769                         printk(KERN_ERR "hifn795x: invalid hifn_pll_ref "
2770                                         "frequency, must be in the range "
2771                                         "of 20-100");
2772                         return -EINVAL;
2773                 }
2774         }
2775
2776         err = pci_register_driver(&hifn_pci_driver);
2777         if (err < 0) {
2778                 dprintk("Failed to register PCI driver for %s device.\n",
2779                                 hifn_pci_driver.name);
2780                 return -ENODEV;
2781         }
2782
2783         printk(KERN_INFO "Driver for HIFN 795x crypto accelerator chip "
2784                         "has been successfully registered.\n");
2785
2786         return 0;
2787 }
2788
2789 static void __exit hifn_fini(void)
2790 {
2791         pci_unregister_driver(&hifn_pci_driver);
2792
2793         printk(KERN_INFO "Driver for HIFN 795x crypto accelerator chip "
2794                         "has been successfully unregistered.\n");
2795 }
2796
2797 module_init(hifn_init);
2798 module_exit(hifn_fini);
2799
2800 MODULE_LICENSE("GPL");
2801 MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
2802 MODULE_DESCRIPTION("Driver for HIFN 795x crypto accelerator chip.");